Cita APA (7th ed.)

Drucker, P. F. (2011). Innovation & entrepreneurship. Butterworth.

Cita Chicago (17th ed.)

Drucker, Peter F. Innovation & Entrepreneurship. Oxford: Butterworth, 2011.

Cita MLA (9th ed.)

Drucker, Peter F. Innovation & Entrepreneurship. Butterworth, 2011.