Nielsen, M.P.
CRC Press , 1999
Buku Teks
Wight, James K.
[publisher not identified], [date of publication not identified]
Buku Teks
MacGregor, James G.
Prentice-Hall, 2005
Buku Teks
Nawy, Edward G.
Prentice-Hall, 1985
Buku Teks
Wight, James K.
Prentice-Hall, 2009
Buku Teks