APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

Radley, Paul, et al. Horizons. Oxford University Press, 2009.