Interviewer's manual: survey research center
Ann Arbor University of Michigan, 1969
 Buku Teks SO
Wengraf, Tom
Qualitative research interviewing : biographic narrative and semi-structured methods
Sage, 2002
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Research topics
Jakarta : FK-UI, 2005,
 Majalah, Jurnal, Buletin
Journal of research in science, computing, and engineering
Manila : De La Saller University, 2007,
 Majalah, Jurnal, Buletin
Thyer, Bruce A.
The handbook of social work research methods
London : Sage, 2001,
 Buku Referensi