Não informado. Soil and land-use surveys. University of the West Indies, Department of Soil Science.
Lua i Stíl Chicago (17ú heag.)Não informado. Soil and Land-use Surveys. St. Augustine, Trinidad e Tobago: University of the West Indies, Department of Soil Science.
Lua MLA (8ú heag.)Não informado. Soil and Land-use Surveys. University of the West Indies, Department of Soil Science.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.