Paul Roberts. (1956). Patterns of English. New York: Harcourt, Brace and World.
Trích dẫn kiểu ChicagoPaul Roberts. Patterns of English. New York: Harcourt, Brace and World, 1956.
MLA CitationPaul Roberts. Patterns of English. New York: Harcourt, Brace and World, 1956.
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