APA-čujuhus (7. p.)
Harder, P. O. (1986). Basic materials in music theory: A programed course. Allyn and Bacon.
Chicago-čujuhus (17. p.)
Harder, Paul O. Basic Materials in Music Theory: A Programed Course. Boston: Allyn and Bacon, 1986.
MLA-čujuhus (9. p.)
Harder, Paul O. Basic Materials in Music Theory: A Programed Course. Allyn and Bacon, 1986.
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