Yap, D. (2013). Earth-friendly tourism come-ons to be pushed. Philippine Daily Inquirer.
Citazione stile Chigago Style (17a edizione)Yap, DJ. "Earth-friendly Tourism Come-ons to Be Pushed." Philippine Daily Inquirer 2013.
Citatione MLA (9a ed.)Yap, DJ. "Earth-friendly Tourism Come-ons to Be Pushed." Philippine Daily Inquirer, 2013.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.