Billington, Michael, author
Macmillan, 1990
Buku Teks
Auden, W.H., author
Oxford University Press, 1973
Buku Teks
Brace & World , 1964
Buku Teks
Gutmacher, Alan F.
Balantine Books, 1961
Buku Teks
Westin, Alan F., author
Harcourt, Brace & World, 1964
Buku Teks