Não informado. (1980). Environmental Technology Letters. Science and Technology Letters.
Chicago-Zitierstil (17. Ausg.)Não informado. Environmental Technology Letters. London: Science and Technology Letters, 1980.
MLA-Zitierstil (8. Ausg.)Não informado. Environmental Technology Letters. Science and Technology Letters, 1980.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.