Sylvester, R. P., Perkins, R., Jr, & Sleeper, R. W. (1990). The moral philosophy of G.E. Moore. Temple University Press.
Lua i Stíl Chicago (17ú heag.)Sylvester, Robert Peter, Ray Perkins, Jr, agus R. W. Sleeper. The Moral Philosophy of G.E. Moore. Philadelphia: Temple University Press, 1990.
Lua MLA (9ú heag.)Sylvester, Robert Peter, et al. The Moral Philosophy of G.E. Moore. Temple University Press, 1990.
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