Cita APA (7a ed.)

Haddon, M. (2010). Polar bears (Repr. with changes.). Methuen Drama.

Cita Chicago Style (17a ed.)

Haddon, Mark. Polar Bears. Repr. with changes. London: Methuen Drama, 2010.

Cita MLA (9a ed.)

Haddon, Mark. Polar Bears. Repr. with changes. Methuen Drama, 2010.