Gillham, Bill, author
Continuum , 2000
Buku Teks
Cambridge University Press, 1997
eBooks
Cornelia Aryanti, author
2017
UI - Skripsi (Membership)
Ross, Catherine Sheldrick, author
Neal - Schuman Publishers, Inc., 2002
Buku Teks
editors, Jaber F. Gubrium, James A. Holstein
Sage, 2002
Buku Referensi