Rodriguez, T. A. (2015). Ilagan, Isabela farmers and two watermelon varieties. IN Up north [column]. Agriculture.
Chicago-referens (17:e uppl.)Rodriguez, Tony A. "Ilagan, Isabela Farmers and Two Watermelon Varieties. IN Up North [column]." Agriculture 2015.
MLA-referens (9:e uppl.)Rodriguez, Tony A. "Ilagan, Isabela Farmers and Two Watermelon Varieties. IN Up North [column]." Agriculture, 2015.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.