Dyfyniad APA

Vincent. (1980). The Power of Positive Thinking Peale, Norman. Harvard Business Review.

Dyfyniad Arddull Chicago

Vincent. The Power of Positive Thinking Peale, Norman. Boston: Harvard Business Review, 1980.

Dyfyniad MLA

Vincent. The Power of Positive Thinking Peale, Norman. Harvard Business Review, 1980.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.