Dyer, Robert F., author
Prentice-Hall International, 1991
Buku Teks
People's Medical Publishing House-USA, 2013
Buku Teks
Makridakis, Spyros G., author
The Free Press, 1990
Buku Teks
Drucker, Peter F. (Peter Ferdinand), 1909-2005, author
Harper & Row, 1964
Buku Teks
McAdams, Alan K., author
Macmillan, 1970
Buku Teks