Estolas, Josefina V.
Fundamentas of research
Miranda, 1973
Buku Teks SO
Moore, Nick
How to do research : a practical guide to designing and managing research projects
Facet Publishing, 2006
Buku Teks SO
Rees, Colin
An introduction to research for midwives / Colin Rees
Churchill Livingstone/Elsevier, 2012
Buku Teks SO
Fowler, Floyd J.
Survey research methods
Sage, 2002
Buku Teks SO
Wilkes, F.M.
Elements of operational research
McGraw-Hill, 1987
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