Columbia University Press, 1994
Buku Teks
Shaw, Ian, author
Sage, 2001
Buku Teks
Schratz, Michael, author
Routledge, 1995
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