Reese, Willis L.M.
Foundation Press, 1971
Buku Teks
Mehren, Arthur Taylor von
Little, Brown, 1965
Buku Teks
Collier, John Greenwood
Cambridge University Pers, 1994
Buku Teks
Rutter, William A.
s.n., 1973
Buku Teks
Collier, John Greenwood
Cambridge University Press, 1994
Buku Teks