Hagberg, G. L. Metaphor: Garry L. Hagberg. The Routledge companion to aesthetics.(2005).
Lua i Stíl Chicago (17ú heag.)Hagberg, Garry L. "Metaphor: Garry L. Hagberg." The Routledge Companion to Aesthetics.(2005) .
Lua MLA (8ú heag.)Hagberg, Garry L. "Metaphor: Garry L. Hagberg." The Routledge Companion to Aesthetics.(2005), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.