MLA

Barnard, Katharine D, and Cathy E Lloyd. Psychology and Diabetes Care. Springer London, 2012.

APA

Barnard, K. D, & Lloyd, C. E. (2012). Psychology and Diabetes Care. Springer London.

Chicago

Barnard, Katharine D., and Cathy E Lloyd. Psychology and Diabetes Care. : Springer London, 2012.