(1970). The chemical industry 1968- 1969. Paris: OECD.
Chicago Style aipamenaThe Chemical Industry 1968- 1969. Paris: OECD, 1970.
MLA aipamenaThe Chemical Industry 1968- 1969. Paris: OECD, 1970.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.