Philippines. Department of Tourism. Region II. (2006). Cagayan Valley Region2006 tourism situationer. Department of Tourism. Regional Office.
Citazione stile Chigago Style (17a edizione)Philippines. Department of Tourism. Region II. Cagayan Valley Region2006 Tourism Situationer. Tuguegarao, Cagayan: Department of Tourism. Regional Office, 2006.
Citatione MLA (9a ed.)Philippines. Department of Tourism. Region II. Cagayan Valley Region2006 Tourism Situationer. Department of Tourism. Regional Office, 2006.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.