Andrews, Gavin J., 1970-
Non-representational theory and​ health: the health in life in space-time revealing
Routledge, Taylor & Francis Group, 2018
 Buku Teks SO
Blaxter, Loraine
How to research
Open University Press, 1996
 Buku Teks SO
Operation research
Juanda Napitupulu ... [et.al.]
Bagian penerbitan Institut Nasional Malang, 1998
 Buku Teks SO
Wicks, C.T.
Operational research
Pan Books, 1971
 Buku Teks SO
Gillham, Bill
The research interview
Continuum, 2000
 Buku Teks SO