Library of Congress. (1996). Subject headings. Washington, D.C: Library of Congress, Cataloging Distribution Service.
استشهاد بنمط شيكاغوLibrary of Congress. Subject Headings. Washington, D.C: Library of Congress, Cataloging Distribution Service, 1996.
MLA استشهادLibrary of Congress. Subject Headings. Washington, D.C: Library of Congress, Cataloging Distribution Service, 1996.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.