Cita APA (7a ed.)

Piontelli, A. (2002). Twins: From fetus to child. Routledge.

Cita Chicago Style (17a ed.)

Piontelli, Alessandra. Twins: From Fetus to Child. London ; New York: Routledge, 2002.

Cita MLA (9a ed.)

Piontelli, Alessandra. Twins: From Fetus to Child. Routledge, 2002.