APA استشهاد

Drucker, P. (2008). Essential Drucker. Butterworth-Heinemann.

استشهاد بنمط شيكاغو

Drucker, Peter. Essential Drucker. Oxford: Butterworth-Heinemann, 2008.

MLA استشهاد

Drucker, Peter. Essential Drucker. Butterworth-Heinemann, 2008.