Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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