Joad, C.E.M., author
Clarendon Press, 1959
Buku Teks
Grimes, Alan P., author
Oxford University Press , 1959
Buku Teks
Grimes, Alan P., author
Oxford University Press , 1959
Buku Teks
Ebenstein, William, author
Holt, Rinehart and Winston, 1962
Buku Teks
Routledge, 2000
Buku Teks