United Nations University. (1990). Global Environmental Change. Butterworth Heinemann.
Citação do estilo Chicago (17ª ed.)United Nations University. Global Environmental Change. Guildford, Inglaterra: Butterworth Heinemann, 1990.
Citação MLA (8ª ed.)United Nations University. Global Environmental Change. Butterworth Heinemann, 1990.
Atenció: Aquestes cites poden no estar 100% correctes.