Cita APA (7a ed.)

Sharpley, A. (1997). Do patients with pure chronic fatigue syndrome (neurasthenia) have abnormal sleep? [s.n.].

Cita Chicago Style (17a ed.)

Sharpley, Ann. Do Patients with Pure Chronic Fatigue Syndrome (neurasthenia) Have Abnormal Sleep? [S.l.]: [s.n.], 1997.

Cita MLA (9a ed.)

Sharpley, Ann. Do Patients with Pure Chronic Fatigue Syndrome (neurasthenia) Have Abnormal Sleep? [s.n.], 1997.