Leighton, Jacqueline P., author
Oxford University Press, 2017
eBooks
Artikel Jurnal
Kvale, Steinar
SAGE Publications, 1996
Buku Teks
Indra Astuti, author
Perpustakaan IPB, 2016
Artikel Jurnal
Brinkmann, Svend, author
Sage Publications , 2015
Buku Teks