APA (7th ed.) Citation

Hirschberg, D. (1949). Duets are fun. Musicord Publications.

Chicago Style (17th ed.) Citation

Hirschberg, David.,comp. Duets Are Fun. New York: Musicord Publications, 1949.

MLA (9th ed.) Citation

Hirschberg, David.,comp. Duets Are Fun. Musicord Publications, 1949.