APA-referens (7:e uppl.)

Richek, M. A. (1989). The world of words: Vocabulary for college students (2nd ed.). Houghton.

Chicago-referens (17:e uppl.)

Richek, Margaret Ann. The World of Words: Vocabulary for College Students. 2nd ed. Boston: Houghton, 1989.

MLA-referens (9:e uppl.)

Richek, Margaret Ann. The World of Words: Vocabulary for College Students. 2nd ed. Houghton, 1989.