Não informado. Soil and land-use surveys. University of the West Indies, Department of Soil Science.
Citação do estilo Chicago (17ª ed.)Não informado. Soil and Land-use Surveys. St. Augustine, Trinidad e Tobago: University of the West Indies, Department of Soil Science.
Citação MLA (8ª ed.)Não informado. Soil and Land-use Surveys. University of the West Indies, Department of Soil Science.
警告：這些引文格式不一定是100％准確.