Gershoy, Leo, author
Appleton Century Crofts, 1964
Buku Teks
Gershoy, Leo, author
Appleton Century Crofts, 1938
Buku Teks
Thompson, J.M., author
Basil Blackwell, 1955.
Buku Teks
Carlyle, Thomas, author
E.P. Dutton, 1955
Buku Teks
Kemp, Herman C., author
KITLV Press, 1990
Buku Referensi