Roche, Edward M., author
Macmillan, 1992
Buku Teks
A Harvard Business Review Book, 1991
Buku Teks
Boone, Mary E., author
McGraw-Hill, 2001
Buku Teks
M. Dachyar, author
Faculty of Engineering, Universitas Indonesia, 2015
Artikel Jurnal
Parker, Charles S., author
McGraw-Hill, 1989
Buku Teks