APA (7e ed.) Bronvermelding

Langan, J. (1999). English skills with readings (4th ed.). McGraw-Hill College.

Chicago (17e ed.) Bronvermelding

Langan, John. English Skills with Readings. 4th ed. Boston: McGraw-Hill College, 1999.

MLA (9e ed.) Bronvermelding

Langan, John. English Skills with Readings. 4th ed. McGraw-Hill College, 1999.