Cita APA (7th ed.)

Harder, P. O. (1980). Harmonic materials in tonal music: A programed course (4th ed.). Allyn and Bacon.

Cita Chicago (17th ed.)

Harder, Paul O. Harmonic Materials in Tonal Music: A Programed Course. 4th ed. Boston: Allyn and Bacon, 1980.

Cita MLA (9th ed.)

Harder, Paul O. Harmonic Materials in Tonal Music: A Programed Course. 4th ed. Allyn and Bacon, 1980.