DRUCKER PETER F. (1992). INNOVATION & ENTREPRENEURSHIP: PRACTICE & PRINCIPLES. EAST WEST BOOK.
Chicago Style aipamenaDRUCKER PETER F. INNOVATION & ENTREPRENEURSHIP: PRACTICE & PRINCIPLES. NEW DELHI: EAST WEST BOOK, 1992.
MLA aipamenaDRUCKER PETER F. INNOVATION & ENTREPRENEURSHIP: PRACTICE & PRINCIPLES. EAST WEST BOOK, 1992.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.