APA (7th ed.) Citation

U. S. Library of Congress. Subject Cataloging Division & United States Library of Congress. Music Division. Classification. Class M, Music. (1957). Classification. Class M: Music and books on music (2nd ed., with supplementary pages.). s.n.

Chicago Style (17th ed.) Citation

U. S. Library of Congress. Subject Cataloging Division and Music United States Library of Congress. Music Division. Classification. Class M. Classification. Class M: Music and Books on Music. 2nd ed., with supplementary pages. Washington: s.n, 1957.

MLA (9th ed.) Citation

U. S. Library of Congress. Subject Cataloging Division and Music United States Library of Congress. Music Division. Classification. Class M. Classification. Class M: Music and Books on Music. 2nd ed., with supplementary pages. s.n, 1957.