United Nations University. (1990). Global Environmental Change. Butterworth Heinemann.
Cita Chicago Style (17a ed.)United Nations University. Global Environmental Change. Guildford, Inglaterra: Butterworth Heinemann, 1990.
Cita MLA (8a ed.)United Nations University. Global Environmental Change. Butterworth Heinemann, 1990.
Precaución: Estas citas no son 100% exactas.