Berry, Ralph
The Research Project : How to Write it.
London : ROUTLEDGE, 1994,
 Buku Referensi
Berry, Ralph
The research project: how to write it
Routledge, 1994
 Buku Teks SO
Fraenkel, Jack R., 1932-2014
How to design and evaluate research in education
McGraw-Hill, 2008
 Buku Teks SO
Fraenkel, Jack R., 1932-2014
How to design and evaluate research in education
McGraw-Hill, 2012
 Buku Teks SO
Fraenkel, Jack R., 1932-2014
How to design and evaluate research in education
McGraw-Hill, 1993
 Buku Teks SO