APA استشهاد

Heller, R. (1988). Complete guide to modern management. Harrap Ltd.

استشهاد بنمط شيكاغو

Heller, Robert. Complete Guide to Modern Management. London: Harrap Ltd, 1988.

MLA استشهاد

Heller, Robert. Complete Guide to Modern Management. Harrap Ltd, 1988.