APA Citation

Kassner, R., & Pfeiffer-Belli, E. (1958). Geistige Welten. Berlin: Ullstein.

Chicago Style Citation

Kassner, Rudolf, and Erich Pfeiffer-Belli. Geistige Welten. Berlin: Ullstein, 1958.

MLA Citation

Kassner, Rudolf, and Erich Pfeiffer-Belli. Geistige Welten. Berlin: Ullstein, 1958.

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