C., D., R., E., B., W.(1997).Elementary differential equations and boundary value problems / William E. Boyce, Richard C. Diprima (Ed.ke-6).New York:John Wiley n Sons.
Gaya MLA
DiPrima, Richard, C.., Boyce, William, E.."Elementary differential equations and boundary value problems / William E. Boyce, Richard C. Diprima".Ed.ke-6New York:John Wiley n Sons,1997.Textbook.