APA (7th ed.) Citation

Metzger, W., Bergius, R., & Thomae, H. (1966). Allgemeine Psychologie. Hogrefe.

Chicago Style (17th ed.) Citation

Metzger, Wolfgang, Rudolf Bergius, and Hans Thomae. Allgemeine Psychologie. Göttingen: Hogrefe, 1966.

MLA (9th ed.) Citation

Metzger, Wolfgang, et al. Allgemeine Psychologie. Hogrefe, 1966.