APA (7th ed.) Citation

Koontz, H., O'Donnell, C., & Weihrich, H. (1982). Essentials of management (3rd ed.). National Book Store.

Chicago Style (17th ed.) Citation

Koontz, Harold, Cyril O'Donnell, and Heinz Weihrich. Essentials of Management. 3rd ed. Manila: National Book Store, 1982.

MLA (9th ed.) Citation

Koontz, Harold, et al. Essentials of Management. 3rd ed. National Book Store, 1982.