Kawasaki, Guy
Portfolio/Penguin, 2011
Buku Teks
edited by Joel Gehman, Michael Lounsbury, Royston Greenwood
Emerald, 2016
eBooks
Coffey, Robert E.
Prentice-Hall, 1975
Buku Teks SO
Wrench, David F.
McGraw-Hill, 1969
Buku Teks
Schein, Edgar H.
Prentice-Hall, 1980
Buku Teks SO