Hering, S. (1958). The Sigmund Hering Trumpet Course. C.Fischer.
Lua i Stíl Chicago (17ú heag.)Hering, Sigmund. The Sigmund Hering Trumpet Course. New York: C.Fischer, 1958.
Lua MLA (8ú heag.)Hering, Sigmund. The Sigmund Hering Trumpet Course. C.Fischer, 1958.
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