APA (7e ed.) Bronvermelding

May P. Peter & Martin J. Jackie. (2008). Knockout. First Certificate: Teacher's Book. Oxford, Oxford University Press, 2008.

Chicago (17e ed.) Bronvermelding

May P. Peter en Martin J. Jackie. Knockout. First Certificate: Teacher's Book. Oxford, Oxford University Press, 2008, 2008.

MLA (9e ed.) Bronvermelding

May P. Peter en Martin J. Jackie. Knockout. First Certificate: Teacher's Book. Oxford, Oxford University Press, 2008, 2008.