Upshur, Carole C., author
Prentice-Hall, 1982
Buku Teks
Drucker, Peter F. (Peter Ferdinand), 1909-2005, author
Harper, 1990
Buku Teks
Wolf, Thomas, author
A fireside Book, 1990
Buku Teks
Grunwald, Iris Q., author
Springer, 2012
eBooks
Gerstenberg, Charles W., author
Prentice-Hall, 1959
Buku Teks