Não informado. (1951). Journal of the Agricultural Society of Trinidad and Tobago. Agricultural Society of Trinidad and Tobago.
Chicago-referens (17:e uppl.)Não informado. Journal of the Agricultural Society of Trinidad and Tobago. Port of Spain: Agricultural Society of Trinidad and Tobago, 1951.
MLA-referens (8:e uppl.)Não informado. Journal of the Agricultural Society of Trinidad and Tobago. Agricultural Society of Trinidad and Tobago, 1951.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.