Schaefer, Charles E., author
The Guilford Press, 2016
Buku Teks
Kim, Seung Kyung, author
Taylor & Francis Group, 2014
Buku Teks SO
Sames, Karen M., author
Pearson Education, 2015
Buku Teks
Policy Press, 2008
Buku Teks
Banerjee, Avijit, author
Oxford University Press, 2015
Buku Teks