Cita APA (7a ed.)

Engel, G. L. (1980). The clinical application of the biopsychosocial model. [s.n.].

Cita Chicago Style (17a ed.)

Engel, George L. The Clinical Application of the Biopsychosocial Model. [S.l.]: [s.n.], 1980.

Cita MLA (9a ed.)

Engel, George L. The Clinical Application of the Biopsychosocial Model. [s.n.], 1980.