Citazione Stile APA (7a Edizione)

United States. Library of Congress & Library of Congress. Policy and Standards Division. (2009). Library of Congress classification. Q. Science ([2009 ed.].). Library of Congress, Cataloging Distribution Service.

Citazione stile Chigago Style (17a edizione)

United States. Library of Congress e Library of Congress. Policy and Standards Division. Library of Congress Classification. Q. Science. [2009 ed.]. Washington, D.C: Library of Congress, Cataloging Distribution Service, 2009.

Citatione MLA (9a ed.)

United States. Library of Congress e Library of Congress. Policy and Standards Division. Library of Congress Classification. Q. Science. [2009 ed.]. Library of Congress, Cataloging Distribution Service, 2009.