Gregory, D. Ideology, science and human geography: Derek Gregory. The spaces of postmodernity : readings in human geography.(2002).
Lua i Stíl Chicago (17ú heag.)Gregory, Derek. "Ideology, Science and Human Geography: Derek Gregory." The Spaces of Postmodernity : Readings in Human Geography.(2002) .
Lua MLA (8ú heag.)Gregory, Derek. "Ideology, Science and Human Geography: Derek Gregory." The Spaces of Postmodernity : Readings in Human Geography.(2002), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.