Johnson, R. D. (1978). Libraries for teaching, libraries for research: Essays for a century (Second printing.). American Library Association.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Johnson, Richard David. Libraries for Teaching, Libraries for Research: Essays for a Century. Second printing. Chicago: American Library Association, 1978.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Johnson, Richard David. Libraries for Teaching, Libraries for Research: Essays for a Century. Second printing. American Library Association, 1978.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.