APA (7th ed.) Citation

Harder, P. O. Harmonic Materials in Tonal Music. [s.n.].

Chicago Style (17th ed.) Citation

Harder, Paul O. Harmonic Materials in Tonal Music. [s.n.].

MLA (8th ed.) Citation

Harder, Paul O. Harmonic Materials in Tonal Music. [s.n.].

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