Citazione Stile APA (7a Edizione)

Martinez, V. A., Plopino, R. F., & Valera, J. B. (1987). An introduction to extension delivery systems. Island Pub. House.

Citazione stile Chigago Style (17a edizione)

Martinez, Vicente A., Ramiro F. Plopino, e Jaime B. Valera. An Introduction to Extension Delivery Systems. Manila: Island Pub. House, 1987.

Citatione MLA (9a ed.)

Martinez, Vicente A., et al. An Introduction to Extension Delivery Systems. Island Pub. House, 1987.