Grover, C. C., & Coburn, M. (1936). A workbook in language usage: For developing facility in written English and for developing an understanding of the use of words. Benj. H. Sanborn & Co..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Grover, Charles C., و Maude Coburn. A Workbook in Language Usage: For Developing Facility in Written English and for Developing an Understanding of the Use of Words. Chicago ; New York [etc.]: Benj. H. Sanborn & Co., 1936.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Grover, Charles C., و Maude Coburn. A Workbook in Language Usage: For Developing Facility in Written English and for Developing an Understanding of the Use of Words. Benj. H. Sanborn & Co., 1936.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.