Não informado. (1967). Agricultural Research Guyana. National Agricultural Research Institute.
Lua i Stíl Chicago (17ú heag.)Não informado. Agricultural Research Guyana. Mon Repos, Guiana: National Agricultural Research Institute, 1967.
Lua MLA (8ú heag.)Não informado. Agricultural Research Guyana. National Agricultural Research Institute, 1967.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.