APA (7th ed.) Citation

Frankl, V. E., Batthyany, A., & Tallon, A. (2010). The feeling of meaninglessness: A challenge to psychotherapy and philosophy. Marquette University Press.

Chicago Style (17th ed.) Citation

Frankl, Viktor E., Alexander Batthyany, and Andrew Tallon. The Feeling of Meaninglessness: A Challenge to Psychotherapy and Philosophy. Milwaukee, Wis.: Marquette University Press, 2010.

MLA (9th ed.) Citation

Frankl, Viktor E., et al. The Feeling of Meaninglessness: A Challenge to Psychotherapy and Philosophy. Marquette University Press, 2010.