Brown, P., & Levinson, S. C. (1987). Politeness: Some Universals in Language Usage. Cambridge: Cambridge University Press.
Holmes, J. (1995). Women, Men, and Politeness. London: Longman.
Tannen, D. (1993). Gender and Discourse. Oxford: Oxford University Press.
Chaer, A. (2010). Kesantunan Berbahasa. Jakarta: Rineka Cipta.
Sugiyono. (2017). Metode Penelitian Kuantitatif, Kualitatif, dan R&D. Bandung: Alfabeta.
Universitas Widyagama Malang. (2023). Profil Universitas Widyagama Malang. Diakses dari www.widyagama.ac.id