Anthony, Robert N. (Robert Newton), 1916-2006, author
Harvard University, 1952
Buku Teks
Allen, Louis A., author
McGraw-Hill Kogakusha, 1958
Buku Teks
O`Shaughnessy, John, author
George Allen and Unwin, 1974
Buku Teks
Lundy, James L., author
Eurasia Publishing House, 1968
Buku Teks
Lawrence, Paul R., author
Graduate School of Business Administration, Harvard University, 1967
Buku Teks