Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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