APA (7th ed.) Citation

Gotham, M., Gullings, K., & Hamm, C. Open Music Theory (Version 2.). Oklahoma State University.

Chicago Style (17th ed.) Citation

Gotham, Mark, Kyle Gullings, and Chelsey Hamm. Open Music Theory. Version 2. [Place of publication not identified]: Oklahoma State University.

MLA (9th ed.) Citation

Gotham, Mark, et al. Open Music Theory. Version 2. Oklahoma State University.