APA استشهاد

Drucker, P. F. (1995). Managing in a time of great change. Butterworth.

استشهاد بنمط شيكاغو

Drucker, Peter F. Managing in a Time of Great Change. London: Butterworth, 1995.

MLA استشهاد

Drucker, Peter F. Managing in a Time of Great Change. Butterworth, 1995.