Ackert, P. (1985). Concepts and comments: A reader for students of English as a second language. New York: Holt.
Chicago-tyylinen lähdeviittausAckert, Patricia. Concepts and Comments: A Reader for Students of English As a Second Language. New York: Holt, 1985.
MLA-viiteAckert, Patricia. Concepts and Comments: A Reader for Students of English As a Second Language. New York: Holt, 1985.
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