Dool, J.H.
McGraw-Hill, 1977
Buku Teks
Kroenke, David M., 1946-
Mitchell Publishing, 1987
Buku Teks
Fuori, William M.
Prentice-Hall, 1981
Buku Teks
Pride, William M.
South Western Cengage Learning, 2012
Buku Teks
Walthall, Wylie A.
Harper and Row, 1987
Buku Teks