APA (7th ed.) Citation

Shook, J. R., & Kurtz, P. (2009). The future of naturalism. Humanity Books.

Chicago Style (17th ed.) Citation

Shook, John R., and Paul Kurtz. The Future of Naturalism. Amherst, New York: Humanity Books, 2009.

MLA (9th ed.) Citation

Shook, John R., and Paul Kurtz. The Future of Naturalism. Humanity Books, 2009.