APA (7th ed.) Citation

Frankl, V. E. (1981). Die Sinnfrage in der Psychotherapie. Piper.

Chicago Style (17th ed.) Citation

Frankl, Viktor E. Die Sinnfrage in Der Psychotherapie. München: Piper, 1981.

MLA (8th ed.) Citation

Frankl, Viktor E. Die Sinnfrage in Der Psychotherapie. Piper, 1981.

Warning: These citations may not always be 100% accurate.