Cita APA (7a ed.)

Packer, T. L., Foster, D. M., & Brouwer, B. (1997). Fatigue and activity patterns of people with chronic fatigue syndrome. [s.n.].

Cita Chicago Style (17a ed.)

Packer, Tanya L., Dawna M. Foster, y Brenda Brouwer. Fatigue and Activity Patterns of People with Chronic Fatigue Syndrome. [S.l.]: [s.n.], 1997.

Cita MLA (9a ed.)

Packer, Tanya L., et al. Fatigue and Activity Patterns of People with Chronic Fatigue Syndrome. [s.n.], 1997.