APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.