APA-referens (7:e uppl.)

Wagenaar, T. C. (1995). Practicing social research (7th.ed.). Wadsworth.

Chicago-referens (17:e uppl.)

Wagenaar, Theodore C. Practicing Social Research. 7th.ed. Belmont: Wadsworth, 1995.

MLA-referens (9:e uppl.)

Wagenaar, Theodore C. Practicing Social Research. 7th.ed. Wadsworth, 1995.