Burke, Karen C., 1951-
Thomson/West, 1999
Buku Teks
McKee, William S.
Warren,Gorham and Lamont, 1978
Buku Teks
Gaffney, Dennis J.
McGraw-Hill, 1982
Buku Teks
Gaffney, Dennis J.
McGraw-Hill, 1984
Buku Teks
Hudson, David M.
St. Paul, Minn, 1994
Buku Teks