APA (7th ed.) Citation

Arnold, W., & Arnold, W. (1980). Lexikon der Psychologie. Herder.

Chicago Style (17th ed.) Citation

Arnold, Wilhelm, and Wilhelm Arnold. Lexikon Der Psychologie. Freiburg [u.a.]: Herder, 1980.

MLA (8th ed.) Citation

Arnold, Wilhelm, and Wilhelm Arnold. Lexikon Der Psychologie. Herder, 1980.

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