Cita APA (7a ed.)

Wolf, S. R., & Koethe, J. (2010). Meaning in Life and Why It Matters. Princeton University Press.

Cita Chicago Style (17a ed.)

Wolf, Susan R., y John Koethe. Meaning in Life and Why It Matters. Princeton, N.J.: Princeton University Press, 2010.

Cita MLA (8a ed.)

Wolf, Susan R., y John Koethe. Meaning in Life and Why It Matters. Princeton University Press, 2010.