MLA

Collen, Morris F, and Marion J Ball. The History of Medical Informatics In the United States. Springer London, 2015.

APA

Collen, M. F, & Ball, M. J. (2015). The History of Medical Informatics in the United States. Springer London.

Chicago

Collen, Morris F., and Marion J Ball. The History of Medical Informatics In the United States. : Springer London, 2015.