Eric Stover, author
Cambridge University Press , 2008
Artikel Jurnal
Qubain, Fahim I.
Frederick A. Praeger Pub., 1958
Buku Teks
Russell, Bertrand, 1872-1970, author
Routledge , 1997
Buku Teks
Vlastos, Gregory, author
A Spectrum Book, 1962
Buku Teks
Longrigg, Stephen Hemsley, author
Frederick A. Praeger, 1958
Buku Teks