The recall method in social surveys
edited by Louis Moss and Harvey Goldstein
University of London Institute of Education, 1979
 Buku Teks SO
Frey, James H.
Survey research by telephone
Sage Publications, 1983
 Buku Referensi
Fern, Edward F.
Advanced focus group research
Sage, 2001
 Buku Teks SO
Magnusson, Eva
Doing interview-based qualitative research : a learner's guide
Cambridge University Press, 2015
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Brinkmann, Svend
InterViews : learning the craft of qualitative research interviewing
Sage, 2015
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