APA (7th ed.) Citation

Stephany, E. (1989). Aachen Cathedral. Arend and Ortmann.

Chicago Style (17th ed.) Citation

Stephany, Erich. Aachen Cathedral. Aachen: Arend and Ortmann, 1989.

MLA (8th ed.) Citation

Stephany, Erich. Aachen Cathedral. Arend and Ortmann, 1989.

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