Rees, Colin
An introduction to research for midwives / Colin Rees
Churchill Livingstone/Elsevier, 2012
 Buku Teks SO
Using qualitative methods in institutional research
edited by David M. Fetterman
Jossey Bass, 1991
 Buku Teks SO
Blalock, Hubert M.
An introduction to social research
Prentice-Hall, 1970
 Buku Teks SO
Blalock, Hubert M.
An introduction to social research
Prentice-Hall, 1982
 Buku Teks SO
Glaser, Barney G.
The Discovery of grounded theory: strategies for qualitative research
Aldine, 1967
 Buku Teks SO