Visperas, E. (2010). Pangasinan officials unveil 300-hectare eco-tourism zone. Philippine Star.
Chicagoスタイル(17版)引用形式Visperas, Eva. "Pangasinan Officials Unveil 300-hectare Eco-tourism Zone." Philippine Star 2010.
MLA(9版)引用形式Visperas, Eva. "Pangasinan Officials Unveil 300-hectare Eco-tourism Zone." Philippine Star, 2010.
警告: この引用は必ずしも正確ではありません.