Guyana. Geological Survey & Guyana. Geological Surveys and Mines Dept. (1967). Report on the Geological Survey Department for the year. Geological Survey Dept..
Citazione stile Chigago Style (17a edizione)Guyana. Geological Survey e Guyana. Geological Surveys and Mines Dept. Report on the Geological Survey Department for the Year. Georgetown: Geological Survey Dept., 1967.
Citatione MLA (8a ed.)Guyana. Geological Survey e Guyana. Geological Surveys and Mines Dept. Report on the Geological Survey Department for the Year. Geological Survey Dept., 1967.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.