Churchman, Charles West, 1913-, author
Prentice-Hall, 1961
Buku Teks
Drucker, Peter F. (Peter Ferdinand), 1909-2005, author
Pan Books, 1970
Buku Teks
Stewart, Rosemary, author
Prentice-Hall, 1982
Buku Teks
Drucker, Peter F. (Peter Ferdinand), 1909-2005, author
Harper & Row, 1964
Buku Teks
Blake, Robert R., author
Texas Gulf, 1961
Buku Teks