Citazione Stile APA (7a Edizione)

Koch, C. (1980). The essay. Textbook Development Committee, De La Salle University.

Citazione stile Chigago Style (17a edizione)

Koch, Carl. The Essay. Manila: Textbook Development Committee, De La Salle University, 1980.

Citatione MLA (9a ed.)

Koch, Carl. The Essay. Textbook Development Committee, De La Salle University, 1980.