Curtis, D. (1961). Your thoughts can change your life. Wilshire Book Co.
Cita Chicago Style (17a ed.)Curtis, Donald. Your Thoughts Can Change Your Life. Wilshire Book Co, 1961.
Cita MLA (9a ed.)Curtis, Donald. Your Thoughts Can Change Your Life. Wilshire Book Co, 1961.
Precaución: Estas citas no son 100% exactas.