Sutherland, W. A. (1975). Introduction to metric and topological spaces. Clarendon Press.
Lua i Stíl Chicago (17ú heag.)Sutherland, Wilson Alexander. Introduction to Metric and Topological Spaces. Oxford: Clarendon Press, 1975.
Lua MLA (9ú heag.)Sutherland, Wilson Alexander. Introduction to Metric and Topological Spaces. Clarendon Press, 1975.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.