Cita APA (7th ed.)
Esser, R. (2008). Vitality: A psychiatrist's answer to life's problems. Algora Pub..
Cita Chicago (17th ed.)
Esser, Richard. Vitality: A Psychiatrist's Answer to Life's Problems. New York: Algora Pub., 2008.
Cita MLA (9th ed.)
Esser, Richard. Vitality: A Psychiatrist's Answer to Life's Problems. Algora Pub., 2008.
Atenció: Aquestes cites poden no estar 100% correctes.