Gaya APA

Rainvelle, E, D., E, I, B, P. (1969). **Elementary differential equations . New York: New York: The Macmillan; 1969.

Gaya MLA

Rainvelle, Earl, D., E, I., Bedient,, Phillip. "**Elementary differential equations". New York: New York: The Macmillan; 1969, 1969. Text.