APA (7th ed.) Citation

Derrick, W. R., Grossman, S. I., & Derrick, W. R. (1997). Elementary differential equations (Fourth edition.). Busybook Distributors.

Chicago Style (17th ed.) Citation

Derrick, William R., Stanley I. Grossman, and William R. Derrick. Elementary Differential Equations. Fourth edition. Quezon City: Busybook Distributors, 1997.

MLA (9th ed.) Citation

Derrick, William R., et al. Elementary Differential Equations. Fourth edition. Busybook Distributors, 1997.