APA
Simmons G. F., Robertson J. S., . (1991). Differential Equations with Applications & Historical Notes. New York: McGraw Hill.
Chicago
Simmons George F, Robertson John S, . 1991. Differential Equations with Applications & Historical Notes. New York: McGraw Hill.
Harvard
Simmons G. F., Robertson J. S., . (1991). Differential Equations with Applications & Historical Notes. New York: McGraw Hill.
MLA
Simmons George F, Robertson John S, . Differential Equations with Applications & Historical Notes. New York: McGraw Hill. 1991.