Campbell, S. L. V. (1982). Singular systems of differential equations II. Pitman Advanced Publishing Program.
Lua i Stíl Chicago (17ú heag.)Campbell, Stephen La Vern. Singular Systems of Differential Equations II. Boston: Pitman Advanced Publishing Program, 1982.
Lua MLA (9ú heag.)Campbell, Stephen La Vern. Singular Systems of Differential Equations II. Pitman Advanced Publishing Program, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.