Platt, Rutherford H., author
Island Press, 2014
Buku Teks
University of Illinois, 1960
Buku Teks
Drucker, Peter F. (Peter Ferdinand), 1909-2005, author
Pan Books, 1982
Buku Teks
Drucker, Peter F. (Peter Ferdinand), 1909-2005, author
Harper & Row, 1945
Buku Teks
Chapin, F. Stuart (Francis Stuart), 1916-, author
University of Illinois Press, 1979
Buku Teks