Dyfyniad APA
Langan, J. (1998). Sentence skills: A workbook for writers : form A (6th ed.). McGraw-Hill.
Dyfyniad Arddull Chicago
Langan, John. Sentence Skills: A Workbook for Writers : Form A. 6th ed. Boston: McGraw-Hill, 1998.
Dyfyniad MLA
Langan, John. Sentence Skills: A Workbook for Writers : Form A. 6th ed. McGraw-Hill, 1998.
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