APA (7th ed.) Citation

Larson, R. E., Hostetler, R. P., & Heyd, D. E. (1989). Trigonometry (2nd ed.). D.C. Heath.

Chicago Style (17th ed.) Citation

Larson, Roland E., Robert P. Hostetler, and David E. Heyd. Trigonometry. 2nd ed. Lexington, Mass: D.C. Heath, 1989.

MLA (9th ed.) Citation

Larson, Roland E., et al. Trigonometry. 2nd ed. D.C. Heath, 1989.