Merrill, W. S. (1928). Code for libraries, principles governing the consistent placing of books in a system of classification. American Library Association.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Merrill, William Stetson. Code for Libraries, Principles Governing the Consistent Placing of Books in a System of Classification. Chicago: American Library Association, 1928.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Merrill, William Stetson. Code for Libraries, Principles Governing the Consistent Placing of Books in a System of Classification. American Library Association, 1928.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.