Cita APA (7a ed.)

Spiegel, D., Sands, S., & Koopman, C. (1994). Pain and depression in patients with cancer. [s.n.].

Cita Chicago Style (17a ed.)

Spiegel, David, Susan Sands, y Cheryl Koopman. Pain and Depression in Patients with Cancer. [S.l.]: [s.n.], 1994.

Cita MLA (9a ed.)

Spiegel, David, et al. Pain and Depression in Patients with Cancer. [s.n.], 1994.