APA (7. basım) Alıntı

U.S. Library of Congress. Subject Cataloging Division. (1950). Classification. Class Q, Science (5th ed.). U.S. Govt. Print. Off.

Chicago Style (17. basım) Atıf

U.S. Library of Congress. Subject Cataloging Division. Classification. Class Q, Science. 5th ed. Washington: U.S. Govt. Print. Off, 1950.

MLA (9th ed.) Atıf

U.S. Library of Congress. Subject Cataloging Division. Classification. Class Q, Science. 5th ed. U.S. Govt. Print. Off, 1950.