Foddy, William, author
Constructing questions for interviews and questionnaires: theory and practice in social research
Cambridge University Press, 1993
 Buku Teks
White, Patrick, 1971-, author
Developing research questions : a guide for social scientists
Palgrave Macmillan, 2009
 Buku Teks
Babbie, Earl, author
The practice of social research
Wadsworth, 2010
 Buku Teks
Babbie, Earl, author
The practice of social research
Thomson/Wadsworth, 2004
 Buku Teks
Babbie, Earl, author
The practice of social research
Wadsworth and Cengage Learning, 2013
 Buku Teks
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