APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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