APA-viite (7. p.)

KELLS, L. M. (1960). Elementary differential equations. McGraw-Hill.

Chicago-viite (17. p.)

KELLS, Lyman M. Elementary Differential Equations. New York: McGraw-Hill, 1960.

MLA-viite (9. p.)

KELLS, Lyman M. Elementary Differential Equations. McGraw-Hill, 1960.