APA (7th ed.) Citation

Apel, M., & Ludz, P. C. (1958). Philosophisches Wörterbuch. de Gruyter.

Chicago Style (17th ed.) Citation

Apel, Max, and Peter Christian Ludz. Philosophisches Wörterbuch. Berlin: de Gruyter, 1958.

MLA (8th ed.) Citation

Apel, Max, and Peter Christian Ludz. Philosophisches Wörterbuch. de Gruyter, 1958.