Turvey, R. (1968). Public enterprise. penguin.
Lua i Stíl Chicago (17ú heag.)Turvey, R. Public Enterprise. Meddlesex: penguin, 1968.
Lua MLA (9ú heag.)Turvey, R. Public Enterprise. penguin, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.