APA (7e ed.) Bronvermelding

Radley, P., & Simons, D. (2009). Horizons. Oxford University Press.

Chicago (17e ed.) Bronvermelding

Radley, Paul, en Daniela Simons. Horizons. Oxford: Oxford University Press, 2009.

MLA (9e ed.) Bronvermelding

Radley, Paul, en Daniela Simons. Horizons. Oxford University Press, 2009.