Cita APA (7a ed.)

Wittenberger, G., & Tögel, C. (1999). 1913 - 1920. Ed. diskord.

Cita Chicago Style (17a ed.)

Wittenberger, Gerhard, y Christfried Tögel. 1913 - 1920. Tübingen: Ed. diskord, 1999.

Cita MLA (8a ed.)

Wittenberger, Gerhard, y Christfried Tögel. 1913 - 1920. Ed. diskord, 1999.