Lauer, J. M. (1991). Four worlds of writing (3rd ed.). New York, NY: HarperCollins Publishers.
Trích dẫn kiểu ChicagoLauer, Janice M. Four Worlds of Writing. 3rd ed. New York, NY: HarperCollins Publishers, 1991.
Deismireacht MLALauer, Janice M. Four Worlds of Writing. 3rd ed. New York, NY: HarperCollins Publishers, 1991.
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