Gershoy, Leo
Appleton Century Crofts, 1938
Buku Teks SO
Carlyle, Thomas
E.P. Dutton, 1955
Buku Teks SO
Thompson, J.M.
Basil Blackwell, 1955.
Buku Teks SO
Kemp, Herman C.
KITLV Press, 1990
Buku Referensi
Brogan, D.W. (Denis William)
Harper & Brothers, 1957
Buku Teks SO