APA استشهاد

Johnson, S. A. (2003). The present: The gift that makes you happy and successful at work and in life.

استشهاد بنمط شيكاغو

Johnson, Spencer; Author. The Present: The Gift That Makes You Happy and Successful at Work and in Life. New York, Bantam Books, 2003.

MLA استشهاد

Johnson, Spencer; Author. The Present: The Gift That Makes You Happy and Successful at Work and in Life. 2003.