Citazione Stile APA (7a Edizione)

Beckman, T. N., & Foster, R. S. (1971). Credits and collections, management and theory (8th ed.). National Book Store.

Citazione stile Chigago Style (17a edizione)

Beckman, Theodore N., e Ronald S. Foster. Credits and Collections, Management and Theory. 8th ed. Manila: National Book Store, 1971.

Citatione MLA (9a ed.)

Beckman, Theodore N., e Ronald S. Foster. Credits and Collections, Management and Theory. 8th ed. National Book Store, 1971.