Cita APA (7a ed.)
Watkins, F. C. (1982). Practical english workbook. Hougton Mifflin Company.
Cita Chicago Style (17a ed.)
Watkins, Floyd C. Practical English Workbook. Boston: Hougton Mifflin Company, 1982.
Cita MLA (9a ed.)
Watkins, Floyd C. Practical English Workbook. Hougton Mifflin Company, 1982.
Precaución: Estas citas no son 100% exactas.