APA
Organisation for Economic Co-Operation and Development, Organisation for Economic Co-Operation and Development, . (1977). Selection and cerification in education and employ. Paris: OECD.
Chicago
Organisation for Economic Co-Operation and Development, Organisation for Economic Co-Operation and Development, . 1977. Selection and cerification in education and employ. Paris: OECD.
Harvard
Organisation for Economic Co-Operation and Development, Organisation for Economic Co-Operation and Development, . (1977). Selection and cerification in education and employ. Paris: OECD.
MLA
Organisation for Economic Co-Operation and Development, Organisation for Economic Co-Operation and Development, . Selection and cerification in education and employ. Paris: OECD. 1977.
