Gray, H. P. (1972). Economics of Business Investment Abroad. Macmillan.
Chicago Style aipamenaGray, H. Peter. Economics of Business Investment Abroad. London: Macmillan, 1972.
MLA aipamenaGray, H. Peter. Economics of Business Investment Abroad. Macmillan, 1972.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.