Guyana Ministry of Education. (2004). Curriculum guide - Social studies: Grade 4. Material Production Unit.
Citazione stile Chigago Style (17a edizione)Guyana Ministry of Education. Curriculum Guide - Social Studies: Grade 4. [S.l.]: Material Production Unit, 2004.
Citatione MLA (9a ed.)Guyana Ministry of Education. Curriculum Guide - Social Studies: Grade 4. Material Production Unit, 2004.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.