Cody, S. (1908). How to do business by letter and training course in business English composition. School of English.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Cody, Sherwin. How to Do Business by Letter and Training Course in Business English Composition. Chicago: School of English, 1908.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Cody, Sherwin. How to Do Business by Letter and Training Course in Business English Composition. School of English, 1908.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.