Nagle, R. K., Saff, E. B., Snider, A. D., & Saff, E. B. (1996). Fundamentals of differential equations (4th ed.). Reading, Mass.: Addison-Wesley Pub. Co..
Παραπομπή Chicago StyleNagle, R. Kent, E. B. Saff, Arthur David Snider, and E. B. Saff. Fundamentals of Differential Equations. 4th ed. Reading, Mass.: Addison-Wesley Pub. Co., 1996.
Παραπομπή MLANagle, R. Kent, E. B. Saff, Arthur David Snider, and E. B. Saff. Fundamentals of Differential Equations. 4th ed. Reading, Mass.: Addison-Wesley Pub. Co., 1996.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.