MLA

Tompkins, Michael A, and Tamara L Hartl. Clinician's Guide to Severe Hoarding. Springer New York, 2015.

APA

Tompkins, M. A, & Hartl, T. L. (2015). Clinician's Guide to Severe Hoarding. Springer New York.

Chicago

Tompkins, Michael A., and Tamara L Hartl. Clinician's Guide to Severe Hoarding. : Springer New York, 2015.