APA (7th ed.) Citation

Smith, D. E., Reeve, W. D., & Morss, E. L. (1928). Essentials of trigonometry: By David Eugene Smith, William David Reeve and Edward Longworth Morss. Ginn.

Chicago Style (17th ed.) Citation

Smith, David Eugene, William David Reeve, and Edward Longworth Morss. Essentials of Trigonometry: By David Eugene Smith, William David Reeve and Edward Longworth Morss. Boston: Ginn, 1928.

MLA (9th ed.) Citation

Smith, David Eugene, et al. Essentials of Trigonometry: By David Eugene Smith, William David Reeve and Edward Longworth Morss. Ginn, 1928.