Sayson, I. C. (2001). Travel industry resorting to big discounts to stay alive. Manila Times.
Chicago-referens (17:e uppl.)Sayson, Ian C. "Travel Industry Resorting to Big Discounts to Stay Alive." Manila Times 2001.
MLA-referens (9:e uppl.)Sayson, Ian C. "Travel Industry Resorting to Big Discounts to Stay Alive." Manila Times, 2001.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.