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.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.