Não informado. (1981). Environmental Education and Information. University of Salford.
Chicago-Zitierstil (17. Ausg.)Não informado. Environmental Education and Information. Salford, Inglaterra: University of Salford, 1981.
MLA-Zitierstil (8. Ausg.)Não informado. Environmental Education and Information. University of Salford, 1981.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.