Cita APA (7a ed.)

Veenhoven, R. (1984). Conditions of happiness. D. Reidel Publishing Company.

Cita Chicago Style (17a ed.)

Veenhoven, Ruut. Conditions of Happiness. Dordrecht ; Boston ; Lancaster: D. Reidel Publishing Company, 1984.

Cita MLA (9a ed.)

Veenhoven, Ruut. Conditions of Happiness. D. Reidel Publishing Company, 1984.