APA (7e ed.) Bronvermelding

Writing Improvement Project. (1977). Building English skills. McDougal, Littell & Company.

Chicago (17e ed.) Bronvermelding

Writing Improvement Project. Building English Skills. Evanston, Illinois: McDougal, Littell & Company, 1977.

MLA (9e ed.) Bronvermelding

Writing Improvement Project. Building English Skills. McDougal, Littell & Company, 1977.

Let op: Deze citaties zijn niet altijd 100% accuraat.