Pelligrini, Anthony D.
Observing children in their Natural worlds : a methodological primer
Lawrence Elbaum Associates, 1996
 Buku Teks
Shaughnessy, John J.
Research methods in psychology
McGrawhill , 1994
 Buku Teks
Bordens, Kenneth S.
Research and design methods: a process approach
McGraw-HIll, 2005
 Buku Teks
Pittenger, David J.
Behavioral research : design and analysis
McGraw-Hill, 2003
 Buku Teks
Qualitative methods in psychology : a research guide
bt Peter Banister ... [and others]
Open University Press, 2006
 Buku Teks