Baglione, Lisa A., author
Thomson Wadsworth, 2007
Buku Teks
Graziano, Anthony M., author
Pearson Education, 2014
Buku Teks
Norman K. Denzin, editor; Yvonna S. Lincoln, editor
Sage Publications, 2003
Buku Teks
New jersey, 2004
Buku Teks
Nancy Duxbury, W.F. Garrett-Petts, David MacLennan, editors
Routledge, 2015
Buku Teks