Lambert, D. (1972). Blackstone. Eyre Methuen Ltd.
Lua i Stíl Chicago (17ú heag.)Lambert, Derek. Blackstone. London: Eyre Methuen Ltd, 1972.
Lua MLA (8ú heag.)Lambert, Derek. Blackstone. Eyre Methuen Ltd, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.