APA

IOC, Schaaf T. e., . (1999). UNESCO and ICSU International Scientific Programmes on Environment and Sustainable Development:Special Forum organized on 30 june 1999 on the occasion of the World Conference on Science: Science for the Twenty-First Century-A New Commitment. Paris: UNESCO.

Chicago

IOC, Schaaf Thomas ed, . 1999. UNESCO and ICSU International Scientific Programmes on Environment and Sustainable Development:Special Forum organized on 30 june 1999 on the occasion of the World Conference on Science: Science for the Twenty-First Century-A New Commitment. Paris: UNESCO.

Harvard

IOC, Schaaf T. e., . (1999). UNESCO and ICSU International Scientific Programmes on Environment and Sustainable Development:Special Forum organized on 30 june 1999 on the occasion of the World Conference on Science: Science for the Twenty-First Century-A New Commitment. Paris: UNESCO.

MLA

IOC, Schaaf Thomas ed, . UNESCO and ICSU International Scientific Programmes on Environment and Sustainable Development:Special Forum organized on 30 june 1999 on the occasion of the World Conference on Science: Science for the Twenty-First Century-A New Commitment. Paris: UNESCO. 1999.