Cita APA (7th ed.)
Derrick, W. R., & Grossman, S. I. (1997). Elementary differential equations (4th.ed.). Addison-Wesley.
Cita Chicago (17th ed.)
Derrick, William R., i Stanley I. Grossman. Elementary Differential Equations. 4th.ed. Massachusetts: Addison-Wesley, 1997.
Cita MLA (9th ed.)
Derrick, William R., i Stanley I. Grossman. Elementary Differential Equations. 4th.ed. Addison-Wesley, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.