Citazione Stile APA (7a Edizione)

Drucker, P. F. (1985). Innovation and entrepreneurship: Practice and principles. Harper & Row.

Citazione stile Chigago Style (17a edizione)

Drucker, Peter Ferdinand. Innovation and Entrepreneurship: Practice and Principles. New York: Harper & Row, 1985.

Citatione MLA (9a ed.)

Drucker, Peter Ferdinand. Innovation and Entrepreneurship: Practice and Principles. Harper & Row, 1985.