Slack, P. (1999). Environments and historical change: The Linacre lectures 1998. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Slack, Paul. Environments and Historical Change: The Linacre Lectures 1998. Oxford: Oxford University Press, 1999.
Lua MLA (9ú heag.)Slack, Paul. Environments and Historical Change: The Linacre Lectures 1998. Oxford University Press, 1999.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.