Hirshberg, Herbert S., author
American Library Association, 1947
Buku Teks
U.S. Govt. Print. Off, 1987
Buku Teks
Schwartz, Bernard, author
Clarendon Press Oxford, 1972
Buku Teks
Mason, Edward Campbell, author
Russell & Russell , 1890
Buku Teks
Harlow, Ralph Volney, author
Holt, Rinehart and Wiston, 1961
Buku Teks