Cita APA (7a ed.)

Chambless, D. L. (1998). Update on empirically validated therapies II. [s.n.].

Cita Chicago Style (17a ed.)

Chambless, Dianne L. Update on Empirically Validated Therapies II. [S.l.]: [s.n.], 1998.

Cita MLA (9a ed.)

Chambless, Dianne L. Update on Empirically Validated Therapies II. [s.n.], 1998.