Cita APA (7th ed.)

U. S. Library of Congress. Subject Cataloging Division. (1957). Classification. Class M: Music and books on music (Second edition.). [U. S. Government Printing Office].

Cita Chicago (17th ed.)

U. S. Library of Congress. Subject Cataloging Division. Classification. Class M: Music and Books on Music. Second edition. Washington: [U. S. Government Printing Office], 1957.

Cita MLA (9th ed.)

U. S. Library of Congress. Subject Cataloging Division. Classification. Class M: Music and Books on Music. Second edition. [U. S. Government Printing Office], 1957.