Cita APA (7a ed.)

Lousada, O. (2009). Hidden twins: What adult opposite sex twins have to teach us. Karnac.

Cita Chicago Style (17a ed.)

Lousada, Olivia. Hidden Twins: What Adult Opposite Sex Twins Have to Teach Us. London: Karnac, 2009.

Cita MLA (9a ed.)

Lousada, Olivia. Hidden Twins: What Adult Opposite Sex Twins Have to Teach Us. Karnac, 2009.