APA (7th ed.) Citation

Elen, L. W. F. (1967). Differential equations / by L.W.F. Elen. Macmilan.

Chicago Style (17th ed.) Citation

Elen, L. W. F. Differential Equations / by L.W.F. Elen. Macmilan, 1967.

MLA (9th ed.) Citation

Elen, L. W. F. Differential Equations / by L.W.F. Elen. Macmilan, 1967.

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