Não informado. (1994). International Journal of Sustainable Development and World Ecology. Parthenon Publishing.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. International Journal of Sustainable Development and World Ecology. Lancs, Inglaterra: Parthenon Publishing, 1994.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. International Journal of Sustainable Development and World Ecology. Parthenon Publishing, 1994.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.