Gaya APA

Penelope, B., C., L, S. (1987). Politeness Some Universals in Language Usage: Studies in Internationasl Sociolinguistics 4 . Cambridge: cambridge university press.

Gaya MLA

Penelope, Brown., C., Levinson, Stephen. "Politeness Some Universals in Language Usage: Studies in Internationasl Sociolinguistics 4". Cambridge: cambridge university press, 1987. UMUM.