APA (7th ed.) Citation

Wagner, H. L. (1999). The psychology of human motivation. Routledge.

Chicago Style (17th ed.) Citation

Wagner, Hugh L. The Psychology of Human Motivation. London: Routledge, 1999.

MLA (9th ed.) Citation

Wagner, Hugh L. The Psychology of Human Motivation. Routledge, 1999.

Warning: These citations may not always be 100% accurate.