Harder, P. O. (1986). Basic materials in music theory: A programed course (6th ed.). Allyn and Bacon.
芝加哥风格引文Harder, Paul O. Basic Materials in Music Theory: A Programed Course. 6th ed. Boston: Allyn and Bacon, 1986.
MLA引文Harder, Paul O. Basic Materials in Music Theory: A Programed Course. 6th ed. Allyn and Bacon, 1986.
警告：这些引文格式不一定是100％准确.