APA-referens (7:e uppl.)

Levin, R. I. (1978). Quantitative approaches to management (4th ed.). National Book Store.

Chicago-referens (17:e uppl.)

Levin, Richard I. Quantitative Approaches to Management. 4th ed. Manila: National Book Store, 1978.

MLA-referens (9:e uppl.)

Levin, Richard I. Quantitative Approaches to Management. 4th ed. National Book Store, 1978.