Cita APA (7a ed.)

Costa, P. T., & McCrae, R. R. (1998). Trait theories of personality. [s.n.].

Cita Chicago Style (17a ed.)

Costa, Paul T., y Robert R. McCrae. Trait Theories of Personality. [S.l.]: [s.n.], 1998.

Cita MLA (9a ed.)

Costa, Paul T., y Robert R. McCrae. Trait Theories of Personality. [s.n.], 1998.