APA (7th ed.) Citation

Smith, N., Browne, G., & Conkling, P. (2022). Introduction to Philosophy. OpenStax.

Chicago Style (17th ed.) Citation

Smith, Nathan, Gregory Browne, and Parish Conkling. Introduction to Philosophy. [Place of publication not identified]: OpenStax, 2022.

MLA (9th ed.) Citation

Smith, Nathan, et al. Introduction to Philosophy. OpenStax, 2022.