APA (7th ed.) Citation

Drucker, P. F. (1967). The effective executive. Harper business essentials.

Chicago Style (17th ed.) Citation

Drucker, Peter F. The Effective Executive. New York: Harper business essentials, 1967.

MLA (8th ed.) Citation

Drucker, Peter F. The Effective Executive. Harper business essentials, 1967.

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