Armstrong, Gary (Gary M.)
Prentice-Hall, 2005
Buku Teks
Peterson, Robin
New York, N.Y., Wiley / Hamilton
Buku Teks
Staud, Thomas A
Prentice-Hall, 1970
Buku Teks
Lancaster, Greoff
Crest, 2001
Buku Teks
Armstrong, Gary (Gary M.)
Prentice-Hall, 2005
Buku Teks