Não informado. (1964). Soil and water. National Water and Soil Conservation Organization.
Chicago-Zitierstil (17. Ausg.)Não informado. Soil and Water. Wellington: National Water and Soil Conservation Organization, 1964.
MLA-Zitierstil (8. Ausg.)Não informado. Soil and Water. National Water and Soil Conservation Organization, 1964.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.