APA استشهاد

O'Donnell, K. (1972). Principles of management: An analysis of managerial functions (Ed.5.).

استشهاد بنمط شيكاغو

O'Donnell, Koontz. Principles of Management: An Analysis of Managerial Functions. Ed.5. New York, Mc Graw Hill, 1972.

MLA استشهاد

O'Donnell, Koontz. Principles of Management: An Analysis of Managerial Functions. Ed.5. 1972.