APA (7th ed.) Citation

Lennes, N. J., Merrill, A. S., & Slaught, H. E. (1928). Plane trigonometry: With a chapter on spherical trigonometry. Harper.

Chicago Style (17th ed.) Citation

Lennes, N. J., A. S. Merrill, and H. E. Slaught. Plane Trigonometry: With a Chapter on Spherical Trigonometry. New York: Harper, 1928.

MLA (9th ed.) Citation

Lennes, N. J., et al. Plane Trigonometry: With a Chapter on Spherical Trigonometry. Harper, 1928.