Travers, Max, author
Sage Publications, 2002
Buku Teks
Green, Judith, 1961-, author
Sage, 2018
Buku Teks
Patton, Michael Quinn, author
SAGE, 2015
Buku Teks
Shaw, Ian, author
Sage, 2001
Buku Teks
edited by Norman K. Denzin, Yvonna S. Lincoln
Sage, 2011
Buku Referensi