Burke, Karen C., 1951-
Thomson/West, 1999
Buku Teks SO
McKee, William S.
Warren,Gorham and Lamont, 1978
Buku Teks SO
McKee, William S.
Warren,Gorham and Lamont, 1978
Buku Teks SO
Gaffney, Dennis J.
McGraw-Hill, 1984
Buku Teks
Burke, Karen C., 1951-
West Publishing, 1996
Buku Teks SO