APA (7th ed.) Citation

Kells, L. M. (1965). Elementary differential equations (6th ed.). Webster School & Office Supplies.

Chicago Style (17th ed.) Citation

Kells, Lyman Morse. Elementary Differential Equations. 6th ed. Manila: Webster School & Office Supplies, 1965.

MLA (9th ed.) Citation

Kells, Lyman Morse. Elementary Differential Equations. 6th ed. Webster School & Office Supplies, 1965.

Warning: These citations may not always be 100% accurate.