The information systems research colloquium : qualitative research methods, vol. I
editors, James I. Cash and Paul R. Lawrence
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Pickard, Alison Jane
Research methods in information
Facet Publishing, 2007
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Siemens, Nicolai,
Operations research: planning, operating and information systems
The Free Press , 1973
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Gorman, G.E.
Qualitative research for the information professional: a practical handbook
Facet Publishing, 2005
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Siemens, Nicolai
Operations research: planning, operating and information systems
The Free Press, 1973
 Buku Teks SO