APA (7th ed.) Citation

Portmann, A. (1961). Neue Wege der Biologie. Piper.

Chicago Style (17th ed.) Citation

Portmann, Adolf. Neue Wege Der Biologie. München: Piper, 1961.

MLA (9th ed.) Citation

Portmann, Adolf. Neue Wege Der Biologie. Piper, 1961.

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