APA Citation

Drucker, P. F. (1985). The effective. New York: Haper Business Essentials.

Chicago Style Citation

Drucker, Peter F. The Effective. New York: Haper Business Essentials, 1985.

MLA Citation

Drucker, Peter F. The Effective. New York: Haper Business Essentials, 1985.

Warning: These citations may not always be 100% accurate.