Gaskell, R. E. (1958). Engineering mathematics. Dryden Press.
Lua i Stíl Chicago (17ú heag.)Gaskell, Robert Eugene. Engineering Mathematics. New York: Dryden Press, 1958.
Lua MLA (9ú heag.)Gaskell, Robert Eugene. Engineering Mathematics. Dryden Press, 1958.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.