Goss, Sue., author
Palgrave, 2001
Buku Teks
Slamet Rosyadi, author
Faculty of Social and Political Sciences, Universitas Jenderal Sudirman, Porwokerto, 2012
Artikel Jurnal
Lamanna, Mary Ann, author
Wadsworth and Cengage Learning, 2011
Buku Teks
Kaniss, Phyllis, author
The University of Chicago Press , 1991
Buku Teks
Roe, Michael, 1954-, author.
Springer, 2013
Buku Teks