APA (7e ed.) Bronvermelding

Kingsbury, R. y. (1996). Grammar Plus 2 (1a. ed.). Longman.

Chicago (17e ed.) Bronvermelding

Kingsbury, Roy y. Grammar Plus 2. 1a. ed. Londres: Longman, 1996.

MLA (9e ed.) Bronvermelding

Kingsbury, Roy y. Grammar Plus 2. 1a. ed. Longman, 1996.