The Bruce , 1953
Buku Teks
Goldthorpe, John H., author
Oxford University Press, 2000
Buku Teks
SAGE Publications , 1989
Buku Teks
Ritzer, George, author
Buku Teks
Drucker, Peter F. (Peter Ferdinand), 1909-2005, author
Heinemann Profesional , 1990
Buku Teks