Schlesinger, Arthur Meier, author
Houghton Mifflin, 1962
Buku Teks
McLaren, John, author
Cambridge University Press, 1996
Buku Teks
Aristotles, author
Modern Library, 1943
Buku Teks
Soltau, Roger H.
Longmans, Green , 1951
Buku Teks
Soltau, Roger H.
Longmans, Green , 1960
Buku Teks