Não informado. (1964). Soil and water. National Water and Soil Conservation Organization.
Citação do estilo Chicago (17ª ed.)Não informado. Soil and Water. Wellington: National Water and Soil Conservation Organization, 1964.
Citação MLA (8ª ed.)Não informado. Soil and Water. National Water and Soil Conservation Organization, 1964.
警告：這些引文格式不一定是100％准確.