Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

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