APA (7th ed.) Citation

DUFF, G. (1967). Partial differential equations. University of Toronto Press.

Chicago Style (17th ed.) Citation

DUFF, G.F.D. Partial Differential Equations. Toronto: University of Toronto Press, 1967.

MLA (9th ed.) Citation

DUFF, G.F.D. Partial Differential Equations. University of Toronto Press, 1967.