Hoffer Charles R. (1983). Teaching music in the secondary schools (3rd ed.). Wadsworth Publ. Co..
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Chicago-čujuhus (17. p.)
Hoffer Charles R. Teaching Music in the Secondary Schools. 3rd ed. California: Wadsworth Publ. Co., 1983.
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MLA-čujuhus (9. p.)
Hoffer Charles R. Teaching Music in the Secondary Schools. 3rd ed. Wadsworth Publ. Co., 1983.
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