Daugherty, William E., author
Arno Press, 1958
Buku Teks
edited by Arthur H. Niehoff
Aldine, 1969
Buku Teks
edited by Robert M. Maclean
[Publisher not identified], [Date of publication not identified]
Buku Teks
Dickson, Gary W., author
McGraw-Hill, 1985
Buku Teks
Bates, George E., author
McGraw-Hill, 1959
Buku Teks