APA (7th ed.) Citation

Drucker, P. F. (1993). The effective executive. Harper Collins Publication.

Chicago Style (17th ed.) Citation

Drucker, Peter F. The Effective Executive. New York: Harper Collins Publication, 1993.

MLA (9th ed.) Citation

Drucker, Peter F. The Effective Executive. Harper Collins Publication, 1993.

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