Perrin, P. G. (1965). Writer's guide and index to English. Chicago: Scott, Foresman and Company.
Trích dẫn kiểu ChicagoPerrin, Porter G. Writer's Guide and Index to English. Chicago: Scott, Foresman and Company, 1965.
MLA citiranjePerrin, Porter G. Writer's Guide and Index to English. Chicago: Scott, Foresman and Company, 1965.
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