Cita APA (7th ed.)

Ziegenfuss, W., & Jung, G. (1949). A - K. de Gruyter.

Cita Chicago (17th ed.)

Ziegenfuss, Werner, i Gertrud Jung. A - K. Berlin: de Gruyter, 1949.

Cita MLA (8th ed.)

Ziegenfuss, Werner, i Gertrud Jung. A - K. de Gruyter, 1949.