Não informado. (1994). International Journal of Sustainable Development and World Ecology. Parthenon Publishing.
Cita Chicago Style (17a ed.)Não informado. International Journal of Sustainable Development and World Ecology. Lancs, Inglaterra: Parthenon Publishing, 1994.
Cita MLA (8a ed.)Não informado. International Journal of Sustainable Development and World Ecology. Parthenon Publishing, 1994.
Precaución: Estas citas no son 100% exactas.