APA (7th ed.) Citation

Schieffer, T., Lothar, I., & Lothaire, I. (1979). Die Urkunden Lothars I. und Lothars II Monumenta Germaniae Historica.

Chicago Style (17th ed.) Citation

Schieffer, Theodor, I. Lothar, and II Lothaire. "Die Urkunden Lothars I. Und Lothars II." Monumenta Germaniae Historica 1979.

MLA (8th ed.) Citation

Schieffer, Theodor, et al. "Die Urkunden Lothars I. Und Lothars II." Monumenta Germaniae Historica, 1979.

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