Gorman, G.E., author
Facet Publishing, 2005
Buku Teks
Silverman, David, author
Sage Publications , 2010
Buku Teks
Silverman, David, author
Sage, 2000
Buku Teks
edited by Norman K. Denzin, Yvonna S. Lincoln
Sage, 2011
Buku Referensi
Norman K. Denzin, Yvonna S. Lincoln, editor
Sage , 2011
Buku Teks