APA (7th ed.) Citation

Drucker, P. F. (1967). The effective executive / Peter F. Drucker. Heinemann Professional.

Chicago Style (17th ed.) Citation

Drucker, Peter F. The Effective Executive / Peter F. Drucker. London: Heinemann Professional, 1967.

MLA (9th ed.) Citation

Drucker, Peter F. The Effective Executive / Peter F. Drucker. Heinemann Professional, 1967.

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