R.R. Bowker Company. Database Publishing Group, R.R. Bowker Company. Dept. of Bibliography, & R.R. Bowker Company. Publications Systems Dept. (1981). Publishers, distributors & wholesalers of the United States. R.R. Bowker.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)R.R. Bowker Company. Database Publishing Group, R.R. Bowker Company. Dept. of Bibliography, و R.R. Bowker Company. Publications Systems Dept. Publishers, Distributors & Wholesalers of the United States. New York: R.R. Bowker, 1981.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)R.R. Bowker Company. Database Publishing Group, et al. Publishers, Distributors & Wholesalers of the United States. R.R. Bowker, 1981.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.