Gaya APA

BOYCE, W, E., DIPRIMA, R, C. (1986). Elementary differential equations and boundary value problems (4th ed.). New York: Wiley.

Gaya MLA

BOYCE, William, E.., DIPRIMA, Richard, C.. "Elementary differential equations and boundary value problems". 4th ed. New York: Wiley, 1986. Buku.