Thorpe, E. (2010). Pearson general knowledge manual 2010. Pearson Education.
Chicago Style aipamenaThorpe, Edgar. Pearson General Knowledge Manual 2010. New delhi: Pearson Education, 2010.
MLA aipamenaThorpe, Edgar. Pearson General Knowledge Manual 2010. Pearson Education, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.