Shaw, Ian, author
Sage, 2001
Buku Teks
Norman K. Denzin, Yvonna S. Lincoln, editors
Sage Publications, 1994
Buku Referensi
Holloway, Immy, author
Blackwell, 1997
Buku Teks
Lindlof, Thomas R., author
Sage, 2011
Buku Teks
Lindlof, Thomas R., author
Sage, 1995
Buku Teks