Gaya APA

Simmons, G, F., Robertzan, J, S. (1991). Diffrential equations eith applications and historical notes (Ed. 2). New York: McGraw-Hill.

Gaya MLA

Simmons, George, F.., Robertzan, John, S.. "Diffrential equations eith applications and historical notes". Ed. 2 New York: McGraw-Hill, 1991. Text.