FRANKL, V. E. (1988). The will to meaning: Foundations and applications of Logotheraphy. Penguin Books.
Lua i Stíl Chicago (17ú heag.)FRANKL, Viktor Emil. The Will to Meaning: Foundations and Applications of Logotheraphy. Penguin Books, 1988.
Lua MLA (9ú heag.)FRANKL, Viktor Emil. The Will to Meaning: Foundations and Applications of Logotheraphy. Penguin Books, 1988.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.