John, F. (1982). Partial differential equations (Fourth edition.). Springer-Verlag.
Lua i Stíl Chicago (17ú heag.)John, Fritz. Partial Differential Equations. Fourth edition. New York: Springer-Verlag, 1982.
Lua MLA (8ú heag.)John, Fritz. Partial Differential Equations. Fourth edition. Springer-Verlag, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.