Cita APA (7th ed.)

MacDonald, L. (2004). Learn to be an optimist: Visualise your way to success, fine lifelong confidence and happiness, discover self-belief. Duncan Baird.

Cita Chicago (17th ed.)

MacDonald, Lucy. Learn to Be an Optimist: Visualise Your Way to Success, Fine Lifelong Confidence and Happiness, Discover Self-belief. London: Duncan Baird, 2004.

Cita MLA (8th ed.)

MacDonald, Lucy. Learn to Be an Optimist: Visualise Your Way to Success, Fine Lifelong Confidence and Happiness, Discover Self-belief. Duncan Baird, 2004.