APA (7th ed.) Citation

Beckenkamp, J. (1922). Über Zwillingsbildung.

Chicago Style (17th ed.) Citation

Beckenkamp, Jakob. Über Zwillingsbildung. Heidelberg, 1922.

MLA (9th ed.) Citation

Beckenkamp, Jakob. Über Zwillingsbildung. 1922.

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