APA (7th ed.) Zitazioa

Powers, D. L. (1979). Boundary value problems (2a. ed.). Academic.

Chicago Style (17th ed.) Zitazioa

Powers, David L. Boundary Value Problems. 2a. ed. Nueva York: Academic, 1979.

MLA (9th ed.) Zitazioa

Powers, David L. Boundary Value Problems. 2a. ed. Academic, 1979.