MLA

Ayten Karaca, and Ayten Karaca. Biology of Earthworms. Springer Berlin Heidelberg, 2011.

APA

Ayten Karaca, A. Karaca, & Karaca, A. (2011). Biology of Earthworms. Springer Berlin Heidelberg.

Chicago

Ayten Karaca, and Ayten Karaca. Biology of Earthworms. : Springer Berlin Heidelberg, 2011.