APA-referens (7:e uppl.)

Ferreira, L. A. (1978). Verbs in action: Intermadiate drills. Newbury House.

Chicago-referens (17:e uppl.)

Ferreira, Linda A. Verbs in Action: Intermadiate Drills. Rowley, Mass: Newbury House, 1978.

MLA-referens (9:e uppl.)

Ferreira, Linda A. Verbs in Action: Intermadiate Drills. Newbury House, 1978.