Vincent. (1980). The Power of Positive Thinking Peale, Norman. Harvard Business Review.
Citazione stile Chigago Style (17a edizione)Vincent. The Power of Positive Thinking Peale, Norman. Boston: Harvard Business Review, 1980.
Citatione MLA (9a ed.)Vincent. The Power of Positive Thinking Peale, Norman. Harvard Business Review, 1980.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.