Sommer, Robert
Behavioral research: Tools and techniques
New York, 2002
 Buku Teks
Gillham, Bill
Research interviewing: the range of techniques
Open University Press, 2008
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Makower, M.S.
Operational research : problems, techniques and exercises
Butles and Tanner , 1970
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Lindzey, Gardner
Projective techniques and cross-cultural research
Appleton Century Crofts, 1961
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Corbetta, Piergiorgio
Social research: theory, methods and techniques
Sage Publications , 2003
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