Parsons, Robert, author
Harper & Row, 1974
Buku Teks
Harton, Raymond L
Charles E.Merril, 1984
Buku Teks
Bhushan, Navneet
Springer, 2004
Buku Teks
Wright, George, author
John Wiley & Sons, 2001
Buku Teks
Buell, Victor P., author
McGraw-Hill, 1984
Buku Teks