Cita APA (7th ed.)

KELLS, L. M. (1966). Elementary differential equations. McGraw-Hill Kogakusha.

Cita Chicago (17th ed.)

KELLS, Lyman M. Elementary Differential Equations. Tokyo: McGraw-Hill Kogakusha, 1966.

Cita MLA (9th ed.)

KELLS, Lyman M. Elementary Differential Equations. McGraw-Hill Kogakusha, 1966.