Frankl, V. E. (2008). Man's search for meaning. Rider.
Lua i Stíl Chicago (17ú heag.)Frankl, Viktor E. Man's Search for Meaning. London: Rider, 2008.
Lua MLA (9ú heag.)Frankl, Viktor E. Man's Search for Meaning. Rider, 2008.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.