Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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