MLA

Schaffer, David V, and Weichang Zhou. Gene Therapy and Gene Delivery Systems. Springer Berlin / Heidelberg, 2005.

APA

Schaffer, D. V, & Zhou, W. (2005). Gene Therapy and Gene Delivery Systems. Springer Berlin / Heidelberg.

Chicago

Schaffer, David V., and Weichang Zhou. Gene Therapy and Gene Delivery Systems. : Springer Berlin / Heidelberg, 2005.