John Wiley & Sons, 2003
Buku Teks SO
editor, John G. Webster
CRC Press, 1999
Buku Referensi
Morgan, David
Peter Peregrinus, 1996
Buku Referensi
Morgan, David
International Engineering Consortium, 2007
eBooks
Eysenck, Michael W.
Psychology Press, 1995
Buku Referensi