APA (7th ed.) Citation

Humperdinck, E., & Karstein, H. (1912). An das Christkind. Brockhaus.

Chicago Style (17th ed.) Citation

Humperdinck, Engelbert, and Hella Karstein. An Das Christkind. [Leipzig: Brockhaus, 1912.

MLA (9th ed.) Citation

Humperdinck, Engelbert, and Hella Karstein. An Das Christkind. Brockhaus, 1912.

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