APA-viite (7. p.)

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

Chicago-viite (17. p.)

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

MLA-viite (9. p.)

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