APA-referens

Powers, D. L. (2010). Boundary value problems: And partial differential equations (6th ed.). Academic press.

Chicago-stil citat

Powers, David L. Boundary Value Problems: And Partial Differential Equations. 6th ed. London: Academic press, 2010.

MLA-referens

Powers, David L. Boundary Value Problems: And Partial Differential Equations. 6th ed. Academic press, 2010.