Não informado. (2018). Report of the Board of Commissioners of Agriculture of Porto Rico. Government of Porto Rico, Board of Commissioners of Agriculture.
Chicago-referens (17:e uppl.)Não informado. Report of the Board of Commissioners of Agriculture of Porto Rico. San Juan: Government of Porto Rico, Board of Commissioners of Agriculture, 2018.
MLA-referens (8:e uppl.)Não informado. Report of the Board of Commissioners of Agriculture of Porto Rico. Government of Porto Rico, Board of Commissioners of Agriculture, 2018.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.