Gaya APA

Levinson, E, A, C, N. (1955). Theory of ordinary differential equantions (TMH edition). New Delhi: Tata McGrawHill Publishing Company Ltd.

Gaya MLA

Levinson, Earl, A., Coddington,, Norman. "Theory of ordinary differential equantions". TMH edition New Delhi: Tata McGrawHill Publishing Company Ltd, 1955. Electronic Resource.