Cita APA (7a ed.)

Hoffman, M. L. (1977). Sex differences in empathy and related behviors. [s.n.].

Cita Chicago Style (17a ed.)

Hoffman, Martin L. Sex Differences in Empathy and Related Behviors. [S.l.]: [s.n.], 1977.

Cita MLA (9a ed.)

Hoffman, Martin L. Sex Differences in Empathy and Related Behviors. [s.n.], 1977.