Ayres, F. (1972). Theory and problems of differential equations. McGraw - Hill.
Chicago Style aipamenaAyres, Frank. Theory and Problems of Differential Equations. New York: McGraw - Hill, 1972.
MLA aipamenaAyres, Frank. Theory and Problems of Differential Equations. McGraw - Hill, 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.