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