Koontz, Harold, author
McGraw-Hill, 1964
Buku Teks
Koontz, Harold, author
Binakawan Study Club, 1969
Buku Teks
Drucker, Peter F. (Peter Ferdinand), 1909-2005, author
Butterworth-Heinemann , 1986
Buku Teks
Schleh, Edward C., author
Prentice-Hall, 1958
Buku Teks
Arnold, John, author
Prentice-Hall, 1990
Buku Teks