APA (7th ed.) Citation

Hallazgo, J. A. A. An introduction to music theory. s.n.

Chicago Style (17th ed.) Citation

Hallazgo, Julie Ann A. An Introduction to Music Theory. [S.l: s.n.

MLA (9th ed.) Citation

Hallazgo, Julie Ann A. An Introduction to Music Theory. s.n.

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