Hocking, J. G. (1961). Topology (1961). Addison-Wesley.
Lua i Stíl Chicago (17ú heag.)Hocking, John G. Topology (1961). London: Addison-Wesley, 1961.
Lua MLA (9ú heag.)Hocking, John G. Topology (1961). Addison-Wesley, 1961.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.