Holt, David H.
Prentice-Hall, 1992
Buku Teks
Lerner, Joshua
John Wiley & Sons, 2012
Buku Teks
Routledge, 2021
eBooks
Schollhammer, Hans
John Wiley & Sons, 1979
Buku Teks
Institute of technology management and entreprreneurship, kolej universiti teknikal kebangsaan malaysia,
Majalah, Jurnal, Buletin