Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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