Não informado. (1960). Geomorphological abstracts. Department of Geography, School of Economics and Political Science.
Chicago-Zitierstil (17. Ausg.)Não informado. Geomorphological Abstracts. London: Department of Geography, School of Economics and Political Science, 1960.
MLA-Zitierstil (8. Ausg.)Não informado. Geomorphological Abstracts. Department of Geography, School of Economics and Political Science, 1960.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.