(1968). Public enterprise. Penguin.
Lua i Stíl Chicago (17ú heag.)Public Enterprise. New York: Penguin, 1968.
Lua MLA (9ú heag.)Public Enterprise. Penguin, 1968.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.
Lua APA (7ú heag.)