1. Al-Duleimi, Hutheifa Y., Sabariah Md. Rashid and Ain Nadzimah Abdullah. 2016. “A Critical Review of Prominent Theories of Politeness.” Advances in Language and Literary Studies 7 (6): 262–270.
2. Beard, Henry, and Christopher Cerf. 1992. The Official Politically Correct Dictionary and Handbook. New York: Villard Books.
3. Bruce, Tammy. 2001. The New Thought Police: Inside the Left’s Assault on the Free Speech and Free Minds. New York: Three Rovers Press.
4. Caldini, B. Robert. 2007. Influence: The Psychology of Persuasion. New York: Harper Business Books.
5. Caldini, B. Robert. 2016. Pre-suasion: A Revolutionary Way to Influence and Persuade. London: Random House Books.