Kvale, Steinar
SAGE Publications, 1996
Buku Teks
Brinkmann, Svend, author
Sage Publications , 2015
Buku Teks
Grbich, Carol, author
Allen and Unwin, 1999
Buku Teks
Wengraf, Tom
Sage Publications, 2002
Buku Teks
Rossman, Gretchen B., author
Sage, 2003
Buku Teks