Organisation for Economic Co-operation and Development. (1975). Patterns of resources devoted to research and experimental development in the OECD AREA, 1963-1971. Paris: Organisation for Economic Co-operation and Development.
استشهاد بنمط شيكاغوOrganisation for Economic Co-operation and Development. Patterns of Resources Devoted to Research and Experimental Development in the OECD AREA, 1963-1971. Paris: Organisation for Economic Co-operation and Development, 1975.
MLA استشهادOrganisation for Economic Co-operation and Development. Patterns of Resources Devoted to Research and Experimental Development in the OECD AREA, 1963-1971. Paris: Organisation for Economic Co-operation and Development, 1975.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.