Dutwin, P., & Diamond, H. (1991). Writing the easy way: For school, business, and personal situations (2nd ed.). Barron's.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Dutwin, Phyllis, و Harriet Diamond. Writing the Easy Way: For School, Business, and Personal Situations. 2nd ed. New York: Barron's, 1991.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Dutwin, Phyllis, و Harriet Diamond. Writing the Easy Way: For School, Business, and Personal Situations. 2nd ed. Barron's, 1991.