Guity, A. & Siyavoshi, S. 2019. An Introduction to Iranian Sign Language and the clturein Iran. Tehran: Neveeseh Parsi Publishing.
Anderson, S. R. 1993. Linguistic Expression and Its Relation to Modality. In G. R. Coulter (Ed.), Current Issues in ASL Phonology (pp. 273-290). Cambridge, MA: Academic Press.
Brown, P., & Levinson, S. 1987. Politeness: Some Universal in Language Usage. Cambridge: Cambridge University Press.
Culpeper, J. 1996. Toward an Anatomy of Impoliteness. Journal of Pragmatics 25: 349-367.
Culpeper, J. 2011. Impoliteness: Using Language to Cause Offence. Cambridge: Cambridge University Press.
Dachkovsky, S., Sandler, W. 2009. Visual intonation in the Prosody of Sign Language. Language and Speech. 52(2/3). 315-339.
Ferreira Brito, L. 1995. Por Uma Grammatica de Linguas de Sinais[for a grammar of Sign Language]. Tempo Brasileiro.
George. J. 2011. Politeness in Japanese Sign Language: Polite JSL expression as evidence for intermodal language contact influence. California digital library.
Hoza, J. 2007. It's not what you sign, it's how you sign it. Washington, D.C: Gallaudet University Press.
Jumanto, I. 2014. Phatic Communication: How English Native Speakers Create Ties on Union. American Journal of Linguistics.
Kendon, A. 2004. Gesture: Visible Action as Utterance. Cambridge: Cambridge University Press.
Langacker. R. W. 1987. Foundations of Cognitive Grammar, Vol, 1: Theoretical Prerequisites. Stanford: Stanford University Press.
Locher, M. & Bousfield, D. 2008. Introduction: Impoliteness and Power in Language in, Bousfield, D & Locher (eds.), M. Impoliteness in Language- Studies on its Interplay with Power and Practice. Berlin: Mouton de Gruyter.
Mapson, R. 2014. Polite Appearances: How non-manual features convey politeness in British Sign Language. Journal if Politeness Research. 10(2): 157-184.
Pfau, R., Quer, J. 2010. Non-manuals: Their and grammatical and prosodic roles. Sign Language. D. Brentari, Cambridge: 381-402.
Roush, D. 2007[1999]. Indirectness Strategies in American Sign Languages Requests and Refusals: Deconstructing the deaf-as-direct Stereotype. Translation, Sociolinguistics, and consumer Issues in Interpreting. M. Metzger and E. Fleetwood. Washington, D. C.: Gallaudet University Press.
Roush, D. 2011. Language Between Bodies: A Cognitive Approach to Understanding Linguistic Politeness in American Sign Language. Sign Language Stusies. Volume 11, N 3: 329-374.
Sandler, W. 2006. Sign Language and Linguistics Universals. Cambridge, UK; New York, Cambridge University Press.
Sandler, W., Lillo-Martin, D. 2006. Sign Language and Linguistic Universals. Cambridge University Press.
Siyavoshi, S. 2019b. Hands and faces: the expression of modality in ZEI, Iranian Sign Language. Cognitive Linguistics 30(4), 655-686.
Sutton-Spence, R., Woll. B. 1999. The Linguistics of British Sign Language: An Introduction. Cambridge: Cambridge University Press.
Tannen, D. 1986. Gender and discourse. Oxford: Oxford University Press.
Valli, C., Lucas, C. 2000. Linguistics of American Sign Language. Washington, D. C.: Gallaudet University Press.
Watts. R. J. 2003. Politeness. Cambridge: Cambridge University Press.
Wilcox, S., Rossini, P., & Pizzuto, E. 2010. Grammaticalization in sign languages. In D. Brentari (Ed.), sign languages (pp 332-354). Cambridge: Cambridge University Press.
Yoshioka, Y. 2013. Politeness in Japanese Sign Language. Japanese Journal of Sign Language. Volume 22, pp 3-36.
Yu. M. 2003. On the Universality of Face: Evidence from Chinese Compliment Response Behavior. Journal of Pragmatics 35: 1679- 1710.
Zimmer, J. 1989. Toward a Description of Register Variation in American Sign Language. The Sociolinguistics of the Deaf Community, Academic Press. Pp. 253-272.