APA (7th ed.) Citation

Holtzmann, W. (1926). Papst Alexander III. und Ungarn. de Gruyter.

Chicago Style (17th ed.) Citation

Holtzmann, Walther. Papst Alexander III. Und Ungarn. Berlin: de Gruyter, 1926.

MLA (9th ed.) Citation

Holtzmann, Walther. Papst Alexander III. Und Ungarn. de Gruyter, 1926.

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