Sorensen, Theodore C., author
Columbia University Press, 1964
Buku Teks
Pinney, William E., author
Harper & Row, 1982
Buku Teks
Simon, Herbert A., author
Harper, 1960
Buku Teks
Render, Barry, author
Pearson, 2015
Buku Teks
Ivancevich, John M., author
Irwin, 1997
Buku Teks