Cita APA (7a ed.)

Hietanen, P., & Lönnquist, J. (1991). Cancer and suicide. [s.n.].

Cita Chicago Style (17a ed.)

Hietanen, P., y J. Lönnquist. Cancer and Suicide. [S.l.]: [s.n.], 1991.

Cita MLA (9a ed.)

Hietanen, P., y J. Lönnquist. Cancer and Suicide. [s.n.], 1991.