DRUCKER , P. (1989). MANAGEMENT TASKS RESPONSIBILITIES PRACTICES. ALLIED PUB.
Chicago Style aipamenaDRUCKER , P.F. MANAGEMENT TASKS RESPONSIBILITIES PRACTICES. AHMEDABAD: ALLIED PUB, 1989.
MLA aipamenaDRUCKER , P.F. MANAGEMENT TASKS RESPONSIBILITIES PRACTICES. ALLIED PUB, 1989.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.