APA (7th ed.) Citation

Library of Congress. (1905). Library of Congress classification: Class Q, science, preliminary, July 1, 1905. US GPO.

Chicago Style (17th ed.) Citation

Library of Congress. Library of Congress Classification: Class Q, Science, Preliminary, July 1, 1905. Washington, D.C.: US GPO, 1905.

MLA (9th ed.) Citation

Library of Congress. Library of Congress Classification: Class Q, Science, Preliminary, July 1, 1905. US GPO, 1905.