APA (7th ed.) Citation

Rintelen, F. v., & Geyser, J. (1930). Abhandlungen zur systematischen Philosophie. Philosophia perennis.

Chicago Style (17th ed.) Citation

Rintelen, Fritz-Joachim von, and Joseph Geyser. "Abhandlungen Zur Systematischen Philosophie." Philosophia Perennis 1930.

MLA (9th ed.) Citation

Rintelen, Fritz-Joachim von, and Joseph Geyser. "Abhandlungen Zur Systematischen Philosophie." Philosophia Perennis, 1930.

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