Langer, R. E. (1954). Ordinary differential equations.
Chicago Style aipamenaLanger, Rudolph E. Ordinary Differential Equations. John Wiley & Sons Inc., New York, 1954.
MLA aipamenaLanger, Rudolph E. Ordinary Differential Equations. 1954.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.