Ayres, F. (1972). Theory and Problems of Differential Equations. McGraw Hill.
Chicago-čujuhus (17. p.)Ayres, Frank. Theory and Problems of Differential Equations. McGraw Hill, 1972.
MLA-čujuhus (9. p.)Ayres, Frank. Theory and Problems of Differential Equations. McGraw Hill, 1972.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.