APA (7th ed.) Citation

Library of Congress. Research Services. (1916). Classification: Class D, Universal and old world history. GPO.

Chicago Style (17th ed.) Citation

Library of Congress. Research Services. Classification: Class D, Universal and Old World History. [Washington]: GPO, 1916.

MLA (9th ed.) Citation

Library of Congress. Research Services. Classification: Class D, Universal and Old World History. GPO, 1916.