Não informado. (1994). International Journal of Sustainable Development and World Ecology. Parthenon Publishing.
Chicago-Zitierstil (17. Ausg.)Não informado. International Journal of Sustainable Development and World Ecology. Lancs, Inglaterra: Parthenon Publishing, 1994.
MLA-Zitierstil (8. Ausg.)Não informado. International Journal of Sustainable Development and World Ecology. Parthenon Publishing, 1994.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.