Harvey, J. (1972). Multiple choice qus. for int. economics. Macmillan.
Chicago Style aipamenaHarvey, J. Multiple Choice Qus. for Int. Economics. London: Macmillan, 1972.
MLA aipamenaHarvey, J. Multiple Choice Qus. for Int. Economics. Macmillan, 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.