Cita APA (7a ed.)

Brülde, B. (2006). Happiness theories of the good life. [s.n.].

Cita Chicago Style (17a ed.)

Brülde, Bengt. Happiness Theories of the Good Life. [S.l.]: [s.n.], 2006.

Cita MLA (9a ed.)

Brülde, Bengt. Happiness Theories of the Good Life. [s.n.], 2006.