Hodge, J. The notebook programmes and projects of Darwińs London years: Jonathan Hodge. The Cambridge Companion to Darwin.(2006).
Lua i Stíl Chicago (17ú heag.)Hodge, Jonathan. "The Notebook Programmes and Projects of Darwińs London Years: Jonathan Hodge." The Cambridge Companion to Darwin.(2006) .
Lua MLA (8ú heag.)Hodge, Jonathan. "The Notebook Programmes and Projects of Darwińs London Years: Jonathan Hodge." The Cambridge Companion to Darwin.(2006), .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.