APA-viite

Koontz, H., Harold koontz, & Cyril O Donnel. (1974). Essentials of management. Mc graw hill.

Chicago-tyylinen lähdeviittaus

Koontz, Harold, Harold koontz, ja Cyril O Donnel. Essentials of Management. New york: Mc graw hill, 1974.

MLA-viite

Koontz, Harold, et al. Essentials of Management. Mc graw hill, 1974.