MLA

Engin, Atilla, and Ayse Basak Engin. Tryptophan Metabolism: Implications for Biological Processes, Health and Disease. Springer International Publishing, 2015.

APA

Engin, A., & Engin, A. Basak. (2015). Tryptophan Metabolism: Implications for Biological Processes, Health and Disease. Springer International Publishing.

Chicago

Engin, Atilla, and Ayse Basak Engin. Tryptophan Metabolism: Implications for Biological Processes, Health and Disease. : Springer International Publishing, 2015.