Dunkerly, David
Routledge, 1972
Buku Teks
Pettinger, Richard
Capstone Publishing, 2002
Buku Teks
Hall, Richard H.
Prentice-Hall, 1987
Buku Teks
Perrow, Charles
Scott, Foresman and Compant, 1978
Buku Teks
Scott, W. Richard, 1932-
Prentice HallInternational, 1992
Buku Teks