Cita APA (7a ed.)

Walther, E., & Walther, E. (1896). Erna Walther's Buch.

Cita Chicago Style (17a ed.)

Walther, Emmy, y Erna Walther. Erna Walther's Buch. [Dachau, 1896.

Cita MLA (9a ed.)

Walther, Emmy, y Erna Walther. Erna Walther's Buch. 1896.