Harvard Business Review. (1991). Motivation. Harvard Business School Publishing.
Citazione stile Chigago Style (17a edizione)Harvard Business Review. Motivation. Boston, Mass: Harvard Business School Publishing, 1991.
Citatione MLA (9a ed.)Harvard Business Review. Motivation. Harvard Business School Publishing, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.