samuelson ,Paul. (2005). Economics. Tata McGraw Hill Publ.
Chicago Style aipamenasamuelson ,Paul. Economics. New delhi: Tata McGraw Hill Publ, 2005.
MLA aipamenasamuelson ,Paul. Economics. Tata McGraw Hill Publ, 2005.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.