Hartley, R.J.
Online searching: principles and practice
Bowker-Saur, 1990
Buku Teks SO
Hammersley, Martyn
Educational research, policymaking and practice
Paul Chapman Publishing, 2002
Buku Teks
Professional psychology : research and practice
American Psychological Association, {s.a}
Majalah, Jurnal, Buletin
Systemic practice and action research
Majalah, Jurnal, Buletin
Babbie, Earl R.
The practice of social research
Wadsworth, 2010
Buku Teks SO