Investigating communication: an introduction to research methods
Lawrence R. Frey...[et al.]
Prentice-Hall, 1991
 Buku Teks
Wiersma, William, author
Research methods in education: an introduction
Pearson/Allyn and Bacon, 2005
 Buku Teks
Wiersma, William, author
Research methods in education : an introduction
Pearson, 2009
 Buku Teks
Research methods in geography: a critical introduction
Basil Gomez and John Paul Jones III, edited
Wiley-Blackwell, 2010
 Buku Teks
Alston, Margaret, author
Research for social workers : an introduction to methods
Allen & Unwin, 1998
 Buku Teks
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