APA ציטוט

Peter F Drucker. (2002). Management Challenges for the 21st Century. Butterworth-Heinemann.

Chicago Edition Citation

Peter F Drucker. Management Challenges for the 21st Century. Butterworth-Heinemann, 2002.

ציטוט MLA

Peter F Drucker. Management Challenges for the 21st Century. Butterworth-Heinemann, 2002.