Cita APA (7th ed.)

Drucker, P. F. (1991). Innovation & entrepreneurship. Altrliated east- west.

Cita Chicago (17th ed.)

Drucker, Peter F. Innovation & Entrepreneurship. New delhi: Altrliated east- west, 1991.

Cita MLA (9th ed.)

Drucker, Peter F. Innovation & Entrepreneurship. Altrliated east- west, 1991.