Library of Congress & Library of Congress. Catalog Maintenance Division. Library of Congress catalog: Books: subjects; a cumulative list of works represented by Library of Congress printed cards. Library of Congress.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Library of Congress و Library of Congress. Catalog Maintenance Division. Library of Congress Catalog: Books: Subjects; a Cumulative List of Works Represented by Library of Congress Printed Cards. Washington: Library of Congress.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Library of Congress و Library of Congress. Catalog Maintenance Division. Library of Congress Catalog: Books: Subjects; a Cumulative List of Works Represented by Library of Congress Printed Cards. Library of Congress.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.