APA (7th ed.) Citation

Library of Congress. Subject Cataloging Division, Gale Research Company, Koenig, W. F., Martel, C., & Perley, C. W. (1933). Classification. Class P, PB-PH: Philology, modern European languages. Printed as manuscript. U. S. Government Printing Office.

Chicago Style (17th ed.) Citation

Library of Congress. Subject Cataloging Division, Gale Research Company, Walther Frederick Koenig, Charles Martel, and Clarence W. Perley. Classification. Class P, PB-PH: Philology, Modern European Languages. Printed as Manuscript. Washington: U. S. Government Printing Office, 1933.

MLA (9th ed.) Citation

Library of Congress. Subject Cataloging Division, et al. Classification. Class P, PB-PH: Philology, Modern European Languages. Printed as Manuscript. U. S. Government Printing Office, 1933.