APA-referens

Sneddon, I. N. (1957). Elements of partial differential equations. Mc Graw - Hill.

Chicago-stil citat

Sneddon, Ian N. Elements of Partial Differential Equations. New York: Mc Graw - Hill, 1957.

MLA-referens

Sneddon, Ian N. Elements of Partial Differential Equations. Mc Graw - Hill, 1957.