(1981). In defence of the earth: The basic texts on environment : Founex, Stockholm, Cocoyoc. United Nations Environment Programme.
Citação do estilo Chicago (17ª ed.)In Defence of the Earth: The Basic Texts on Environment : Founex, Stockholm, Cocoyoc. Nairobi: United Nations Environment Programme, 1981.
Citação MLA (9ª ed.)In Defence of the Earth: The Basic Texts on Environment : Founex, Stockholm, Cocoyoc. United Nations Environment Programme, 1981.
Nota: a formatação da citação pode não corresponder 100% ao definido pela respectiva norma.