APA (7e ed.) Bronvermelding

Langan, J. (1995). English skills with readings (3rd ed.). McGraw-Hill.

Chicago (17e ed.) Bronvermelding

Langan, John. English Skills with Readings. 3rd ed. New York: McGraw-Hill, 1995.

MLA (8e ed.) Bronvermelding

Langan, John. English Skills with Readings. 3rd ed. McGraw-Hill, 1995.