Hering, S. (1966). Trumpets for 2: 25 intermediate trumpet duets from the early classics. Carl Fischer.
Čikaški stil citiranja (17. izdanje)Hering, Sigmund. Trumpets for 2: 25 Intermediate Trumpet Duets from the Early Classics. New York: Carl Fischer, 1966.
MLA način citiranja (9. izdanje)Hering, Sigmund. Trumpets for 2: 25 Intermediate Trumpet Duets from the Early Classics. Carl Fischer, 1966.
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