Ellsworth, P. T. (1969). The international economy (4th ed.). Macmillan.
Chicago Style (17th ed.) ZitazioaEllsworth, Paul Theodore. The International Economy. 4th ed. NewYork: Macmillan, 1969.
MLA (9th ed.) ZitazioaEllsworth, Paul Theodore. The International Economy. 4th ed. Macmillan, 1969.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.