Sagarin, Rafe
Observation and ecology : broadening the scope of science to understand a complex world
Island Press, 2012
Podmore, Valerie N.
Observation: origins and approaches in early childhood
McGraw-Hill, 2012
 Buku Teks
Allwright, Dick
Observation in the language classroom
Longman, 1993
 Buku Teks
Brenner, Charles
An elementary textbook of psychoanalysis
Anchor Book, 1973
 Buku Teks
Freud, Sigmund, 1856-1939
A general introduction to psychoanalysis
Washington Square Press, 1960
 Buku Teks