United States. Library of Congress. Cataloging Policy and Support Office & Library of Congress. Cataloging Distribution Service. (1997). Free-floating subdivisions: An alphabetical index (9th ed.). Library of Congress, Cataloging Distribution Service.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিUnited States. Library of Congress. Cataloging Policy and Support Office এবং Library of Congress. Cataloging Distribution Service. Free-floating Subdivisions: An Alphabetical Index. 9th ed. Washington, D.C: Library of Congress, Cataloging Distribution Service, 1997.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিUnited States. Library of Congress. Cataloging Policy and Support Office এবং Library of Congress. Cataloging Distribution Service. Free-floating Subdivisions: An Alphabetical Index. 9th ed. Library of Congress, Cataloging Distribution Service, 1997.