APA استشهاد

Levin, R. (1986). Quantitative approaches to management/6e (6th ed.). Mc Graw Hill.

استشهاد بنمط شيكاغو

Levin, Richard. Quantitative Approaches to Management/6e. 6th ed. singapore: Mc Graw Hill, 1986.

MLA استشهاد

Levin, Richard. Quantitative Approaches to Management/6e. 6th ed. Mc Graw Hill, 1986.