Drucker, Peter Ferdinand, 1909-2005
Pan Books, 1982
Buku Teks
Drucker, Peter Ferdinand, 1909-2005
Harper & Row, 1945
Buku Teks
Clinard, Marshall B. (Marshall Barron)
Sage Publications, 1985
Buku Teks
compiled by David R. Hampton
Prentince-Hall of India, 1979
Buku Teks
Pitts, Robert A.
South-Western College Publishing, 2000
Buku Teks