APA (7th ed.) Zitazioa
Contreras, D. A. (2010). Psychology of thinking. Nova Science Publishers.
Chicago Style (17th ed.) Zitazioa
Contreras, David A. Psychology of Thinking. New York: Nova Science Publishers, 2010.
MLA (9th ed.) Zitazioa
Contreras, David A. Psychology of Thinking. Nova Science Publishers, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.