Citazione Stile APA (7a Edizione)

Mabutas, A. (1977). The Philippine agricultural extension service: Guidebook for extensionists (Updated rev., enl.). Vera Print. Press.

Citazione stile Chigago Style (17a edizione)

Mabutas, Andres. The Philippine Agricultural Extension Service: Guidebook for Extensionists. Updated rev., enl. Manila: Vera Print. Press, 1977.

Citatione MLA (9a ed.)

Mabutas, Andres. The Philippine Agricultural Extension Service: Guidebook for Extensionists. Updated rev., enl. Vera Print. Press, 1977.