Lua APA (7ú heag.)
Frankl, V. E., Batthyany, A., & Tallon, A. (2010). The feeling of meaninglessness: A challenge to psychotherapy and philosophy. Marquette University Press.
Lua i Stíl Chicago (17ú heag.)
Frankl, Viktor E., Alexander Batthyany, agus Andrew Tallon. The Feeling of Meaninglessness: A Challenge to Psychotherapy and Philosophy. Milwaukee, Wis.: Marquette University Press, 2010.
Lua MLA (9ú heag.)
Frankl, Viktor E., et al. The Feeling of Meaninglessness: A Challenge to Psychotherapy and Philosophy. Marquette University Press, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.