Brewer, J. M., Hurlbut, F., & Caseman, J. (1935). Key and Manual: To accompany Elements of business training new edition and workbook. Ginn and Company.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Brewer, John M., Floyd Hurlbut, و Juvenilia Caseman. Key and Manual: To Accompany Elements of Business Training New Edition and Workbook. [Boston]: Ginn and Company, 1935.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Brewer, John M., et al. Key and Manual: To Accompany Elements of Business Training New Edition and Workbook. Ginn and Company, 1935.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.