MLA

Silbermann, Robert Max, and Folkert Beenen. Cham, a Classification of Psychiatric States. Amsterdam: Excerpta Medica, 1971.

APA

Silbermann, R. Max, & Beenen, F. (1971). CHAM, a classification of psychiatric states. Amsterdam: Excerpta Medica.

Chicago

Silbermann, Robert Max, and Folkert Beenen. CHAM, a Classification of Psychiatric States. Amsterdam: Excerpta Medica, 1971.