APA (7th ed.) Citation

Voegelin, E., Von Sivers, P. c. 2. J., & Caringella, P. (1997). The Middle Ages to Aquinas. The collected works of Eric Voegelin..

Chicago Style (17th ed.) Citation

Voegelin, Eric, Peter ca. 20./21. Jh Von Sivers, and Paul Caringella. "The Middle Ages to Aquinas." The Collected Works of Eric Voegelin. 1997.

MLA (9th ed.) Citation

Voegelin, Eric, et al. "The Middle Ages to Aquinas." The Collected Works of Eric Voegelin., 1997.

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