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.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLibrary of Congress. Subject Cataloging Division, Gale Research Company, Walther Frederick Koenig, Charles Martel, और Clarence W. Perley. Classification. Class P, PB-PH: Philology, Modern European Languages. Printed as Manuscript. Washington: U. S. Government Printing Office, 1933.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLibrary 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.