McGehee, P. (1985). Beyond happiness. Stubbeljumper Press.
Cita Chicago (17th ed.)McGehee, Peter. Beyond Happiness. Toronto: Stubbeljumper Press, 1985.
Cita MLA (8th ed.)McGehee, Peter. Beyond Happiness. Stubbeljumper Press, 1985.
Atenció: Aquestes cites poden no estar 100% correctes.