APA (7th ed.) Citation

Wolf, S. R., Macedo, S., & Koethe, J. (2010). Meaning in life and why it matters. Princeton University Press.

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

Wolf, Susan R., et al. Meaning in Life and Why It Matters. Princeton University Press, 2010.