Research methods: guidance for postgraduates
edited by Tony Greenfield
Arnold, 1996
Buku Teks SO
Holloway, Immy
Basic concepts for qualitative research
Blackwell Science, 1997
Buku Teks SO
The Methodology of comparative research
edited by Robert T. Holt
Free Press, 1970
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Leedy, Paul D.
Practical research: planning and design
Pearson Education, 2005
Buku Teks SO
Winardi
Pengantar metodologi research
Alumni, 1979
Buku Teks SO