Gaya APA

Levin, R, I. et al (1989). Quntitative Approaches to Management (Ed. 1). New York: Mcgraw-Hill Book Company, INC..

Gaya MLA

Levin, Richard, I.. et al. "Quntitative Approaches to Management". Ed. 1 New York: Mcgraw-Hill Book Company, INC., 1989. Text.