APA (7th ed.) Citation

Gordon, J. S. (2008). Unstuck: Your guide to the seven-stage journey out of depression. Penguin Books.

Chicago Style (17th ed.) Citation

Gordon, James S. Unstuck: Your Guide to the Seven-stage Journey Out of Depression. London: Penguin Books, 2008.

MLA (8th ed.) Citation

Gordon, James S. Unstuck: Your Guide to the Seven-stage Journey Out of Depression. Penguin Books, 2008.