Hollinger, R., Klemke, E. D., & Kline, A. D. (1982). Philosophy: The basic issues. St. Martin's Press.
Lua i Stíl Chicago (17ú heag.)Hollinger, Robert, E. D. Klemke, agus A. David Kline. Philosophy: The Basic Issues. New York: St. Martin's Press, 1982.
Lua MLA (9ú heag.)Hollinger, Robert, et al. Philosophy: The Basic Issues. St. Martin's Press, 1982.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.