Maibach, Howard, author
Allured Books, 2011
Buku Teks
Rossiter, Clinton, 1917-1970, author
Harcourt Brace, 1960
Buku Teks
Powell, Anthony
London John Lehmann 1948
Buku Teks
Artikel Jurnal
Quine, Willard van Orman, author
Harvard University Press, 1980
Buku Teks