APA (7th ed.) Citation

Katharina von Siena, H. The letters of St. Catherine of Siena. Center for Medieval and Early Renaissance Studies.

Chicago Style (17th ed.) Citation

Katharina von Siena, Heilige. The Letters of St. Catherine of Siena. Binghamton, NY: Center for Medieval and Early Renaissance Studies.

MLA (9th ed.) Citation

Katharina von Siena, Heilige. The Letters of St. Catherine of Siena. Center for Medieval and Early Renaissance Studies.

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