Bailey, Kenneth D., author
The free press, 1994
Buku Teks
Reinharz, Shulamit
Oxford University Press, 1992
Buku Teks
Bryman, Alan, author
Oxford University Press, 2016
Buku Teks
Bank, Marcus, author
Sage Publications, 2001
Buku Teks
edited, Bridget Somekh, Cathy Lewin
Sage Publications , 2005
Buku Teks