Turner, R. (1987). Thinkers of the Twenthieth century (2nd ed.). St. James Press.
Lua i Stíl Chicago (17ú heag.)Turner, Roland. Thinkers of the Twenthieth Century. 2nd ed. Chicago : London: St. James Press, 1987.
Lua MLA (9ú heag.)Turner, Roland. Thinkers of the Twenthieth Century. 2nd ed. St. James Press, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.