APA (7th ed.) Citation

McWilliams, P. (1995). You can't afford the luxury of a negative thought. Prelude Press.

Chicago Style (17th ed.) Citation

McWilliams, Peter. You Can't Afford the Luxury of a Negative Thought. Los Angeles, California: Prelude Press, 1995.

MLA (9th ed.) Citation

McWilliams, Peter. You Can't Afford the Luxury of a Negative Thought. Prelude Press, 1995.