edited by Harry T. Reis and Charles M. Judd
Cambridge University Press, 2000
Buku Teks
Barrick, Murray, author
Jossessy Bass, 2003
Buku Teks
Ward, Kate, author
McGraw-Hill, 2012
Buku Referensi
Faisal Djamal, author
United Nations Development Programme (UNDP), 2009
Buku Teks
edited by P.J.D. Drenth ... [and others]
Wiley, 1984
Buku Teks