Barcelona, A. (2015). Prospets of commercial vegetable production. IN Predictions [column]. Agriculture.
Chicago-referens (17:e uppl.)Barcelona, Arsenio. "Prospets of Commercial Vegetable Production. IN Predictions [column]." Agriculture 2015.
MLA-referens (9:e uppl.)Barcelona, Arsenio. "Prospets of Commercial Vegetable Production. IN Predictions [column]." Agriculture, 2015.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.