Sayson, I. C. (2001). Travel industry resorting to big discounts to stay alive. Manila Times.
Lua i Stíl Chicago (17ú heag.)Sayson, Ian C. "Travel Industry Resorting to Big Discounts to Stay Alive." Manila Times 2001.
Lua MLA (9ú heag.)Sayson, Ian C. "Travel Industry Resorting to Big Discounts to Stay Alive." Manila Times, 2001.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.