Cita APA (7a ed.)

Goldschneider, G., & Elffers, J. (1999). The secret language of destiny: A personology guide to finding your life purpose. Viking Studio.

Cita Chicago Style (17a ed.)

Goldschneider, Gary, y Joost Elffers. The Secret Language of Destiny: A Personology Guide to Finding Your Life Purpose. New York: Viking Studio, 1999.

Cita MLA (9a ed.)

Goldschneider, Gary, y Joost Elffers. The Secret Language of Destiny: A Personology Guide to Finding Your Life Purpose. Viking Studio, 1999.