APA (7th ed.) Zitazioa
Frankl, V. E. (1967). PSYCHOTHERAPY AND EXISTENTIALISM: SELECTED PAPERS ON LOGOTHERAPY.
Chicago Style (17th ed.) Zitazioa
Frankl, Viktor E. PSYCHOTHERAPY AND EXISTENTIALISM: SELECTED PAPERS ON LOGOTHERAPY. 1967.
MLA (9th ed.) Zitazioa
Frankl, Viktor E. PSYCHOTHERAPY AND EXISTENTIALISM: SELECTED PAPERS ON LOGOTHERAPY. 1967.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.