Não informado. (1967). OECD Economic Outlook. Organization for Economic Co-operation and Development.
Lua i Stíl Chicago (17ú heag.)Não informado. OECD Economic Outlook. Paris: Organization for Economic Co-operation and Development, 1967.
Lua MLA (8ú heag.)Não informado. OECD Economic Outlook. Organization for Economic Co-operation and Development, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.