Cita APA (7a ed.)

Butler, S. (1991). Cognitive behaviour therapy in chronic fatigue syndrome. [s.n.].

Cita Chicago Style (17a ed.)

Butler, S. Cognitive Behaviour Therapy in Chronic Fatigue Syndrome. [S.l.]: [s.n.], 1991.

Cita MLA (9a ed.)

Butler, S. Cognitive Behaviour Therapy in Chronic Fatigue Syndrome. [s.n.], 1991.