Jim Mcgoldrick, editor
Routledge, 2001
Buku Teks
Bhattacharyya, Dipak Kumar
Oxford University Press , 2014
Buku Teks
Greenlaw, Paul S.
Harper & Row, 1986
Buku Teks
Storey, John, 1950-
Blackwell, 1992
Buku Teks
Sikula, Andrew F.
Cal Wiley, 1976
Buku Teks