APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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

Let op: Deze citaties zijn niet altijd 100% accuraat.