Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (9ú heag.)

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

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