Gaya APA

Boyce, W, E., DiPrima, R, C. (1977). Elementary Differential Equations and Boundary Value Problems (3). New York: John Wiley & Sons.

Gaya MLA

Boyce, William, E.., DiPrima, Richard, C.. "Elementary Differential Equations and Boundary Value Problems". 3 New York: John Wiley & Sons, 1977. Text.