Naidoo, Jenniem]
Bailliere Tindal Elsevier, 2011
Buku Teks
Sage Publications, 2012
eBooks
Indian Institute of Management, 1991
Buku Teks
editors, Lester Breslow, Jonathan E. Fielding, Lester B. Lave
Annual Reviews, 1990
Buku Teks
Berridge, Virginia
McGraw-Hill, 2011
Buku Teks