Holloway, Immy, author
Blackwell Science, 1997
Buku Teks
Rice, Pranee Liamputtong, author
Oxford University Press, 1999
Buku Teks
Sari Wahyuni, author
Penerbit Salemba Empat, 2011
Buku Teks
McLeod, John, author
Sage Publications, 2002
Buku Teks
Grbich, Carol, author
Allen and Unwin, 1999
Buku Teks