Bullis, L. Harold
Westview Press, 1985
Buku Teks
Bullis, L. Harold
Westview Press, 1985
Buku Teks
Moore, James F.
HarperCollins Publishers, 1996
Buku Teks
Wheelen, Thomas L., author
Parson, 2004
Buku Teks
Wheelen, Thomas L., author
Parson, 2004
Buku Teks