Citazione Stile APA (7a Edizione)

Writing Improvement Project. Building english skills orange level composition. Ill. McDougal.

Citazione stile Chigago Style (17a edizione)

Writing Improvement Project. Building English Skills Orange Level Composition. Evanston: Ill. McDougal.

Citatione MLA (9a ed.)

Writing Improvement Project. Building English Skills Orange Level Composition. Ill. McDougal.