APA (7th ed.) Citation

Harder, P. O., & Stienke, G. A. (1991). Basic material in music theory: A programed course. Allyn and Bacon.

Chicago Style (17th ed.) Citation

Harder, Paul O., and Greg A. Stienke. Basic Material in Music Theory: A Programed Course. Allyn and Bacon, 1991.

MLA (8th ed.) Citation

Harder, Paul O., and Greg A. Stienke. Basic Material in Music Theory: A Programed Course. Allyn and Bacon, 1991.

Warning: These citations may not always be 100% accurate.