Punch, Keith F.
Developing effective research proposlas
Sage Publications, 2008
 Buku Teks
Morrison, Ray
Developing effective engineering leadership
Institution of Engineering and Technology, 2006
 eBooks
Knowles, John
Effective legal research paperback
Sweet & Maxwell, 2012
 Buku Teks
Price, Miles Oscar, 1890-1968
Effective legal research
Brown and Company, 1979
 Buku Referensi
Price, Miles Oscar, 1890-1968
Effective legal research
Little, Brown, 1979
 Buku Teks