Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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

Atenció: Aquestes cites poden no estar 100% correctes.