Stewart, Rosemary, author
Prentice-Hall, 1982
Buku Teks
Radford, K.J., author
Phoenix Press, 1981
Buku Teks
Newman, William H., author
Prentice-Hall of Japan, 1963
Buku Teks
Drucker, Peter F. (Peter Ferdinand), 1909-2005, author
Harper, 1986
Buku Teks
Gray, Jerry L., author
Charles E. Merrill, 1984
Buku Teks