Peters, John G., author
[Cambridge University Press, ], 2013
eBooks
Steppat, Michael, author
B.R. Gruner, 1980
Buku Teks
Barnes, John, author
Landsdowne, s 1963
Koleksi Publik
Berthelot, Joseph A.
Twayne Publishers, 1967
Buku Teks
Henson, Clyde E.
Twayne Publishers, Inc., 1962
Buku Teks