Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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