APA (7e ed.) Bronvermelding

De Gracia, A. G. Q. (2009). Competence in college English. Rex Book Store.

Chicago (17e ed.) Bronvermelding

De Gracia, Alta Grace Q. Competence in College English. Manila: Rex Book Store, 2009.

MLA (9e ed.) Bronvermelding

De Gracia, Alta Grace Q. Competence in College English. Rex Book Store, 2009.