APA (7th ed.) Citation
Watkins, F., & Hiers, J. (1989). Practical English workbook (4th ed.). Houghton.
Chicago Style (17th ed.) Citation
Watkins, Floyd, and John Hiers. Practical English Workbook. 4th ed. Boston: Houghton, 1989.
MLA (9th ed.) Citation
Watkins, Floyd, and John Hiers. Practical English Workbook. 4th ed. Houghton, 1989.
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