APA (7th ed.) Citation

Buck, R. C., Buck, E. F., & Buck, . D. P. Introduction to Differential Equations.

Chicago Style (17th ed.) Citation

Buck, R. Creighton, Ellen F. Buck, and Donald P. Buck. Introduction to Differential Equations.

MLA (9th ed.) Citation

Buck, R. Creighton, et al. Introduction to Differential Equations.