APA (7th ed.) Citation

Grotz, H. (1980). Beobachtungen zu den zwei Briefen Papst Gregors II. an Kaiser Leo III. Archivum historiae pontificiae, 18, 9-40.

Chicago Style (17th ed.) Citation

Grotz, Hans. "Beobachtungen Zu Den Zwei Briefen Papst Gregors II. an Kaiser Leo III." Archivum Historiae Pontificiae 18 (1980): 9-40.

MLA (8th ed.) Citation

Grotz, Hans. "Beobachtungen Zu Den Zwei Briefen Papst Gregors II. an Kaiser Leo III." Archivum Historiae Pontificiae, vol. 18, 1980, pp. 9-40.

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