Cita APA (7a ed.)

Brett, J. (2002). Who's that knocking on Christmas Eve? G.P. Putnam.

Cita Chicago Style (17a ed.)

Brett, Jan. Who's That Knocking on Christmas Eve? New York: G.P. Putnam, 2002.

Cita MLA (8a ed.)

Brett, Jan. Who's That Knocking on Christmas Eve? G.P. Putnam, 2002.

Precaución: Estas citas no son 100% exactas.