APA (7th ed.) Zitazioa
(2001). Research and development expenditure in industry 1987-1999. OECD.
Chicago Style (17th ed.) Zitazioa
Research and Development Expenditure in Industry 1987-1999. Paris, Cedex, France: OECD, 2001.
MLA (9th ed.) Zitazioa
Research and Development Expenditure in Industry 1987-1999. OECD, 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.