O`grady, William
How children learn language / William O'grady
Cambridge University Press, 2007
 Buku Teks
Kidd
How adults learn / Kidd
Cambridge University Press, 1973
 Buku Teks
Kellett, Mary
How to develop children as researchers: a step-by-step guide to teaching the research process
Paul Chapman Publishing, 2005
 Buku Teks
Blaxter, Loraine
How to research
Open University Press , 1996
 Buku Teks
Bode, Boyd Henry
How we learn / Boyd Henry Bode.
D.C Heath and Company, 1940
 Buku Teks