MLA

David R. Gang, David R Gang, and David Gang. The Biological Activity of Phytochemicals. Springer New York, 2011.

APA

David R. Gang, D. R. Gang, Gang, D. R, & Gang, D. (2011). The Biological Activity of Phytochemicals. Springer New York.

Chicago

David R. Gang, David R Gang, and David Gang. The Biological Activity of Phytochemicals. : Springer New York, 2011.