Cruz, N. . H. (1998). To Vigilar Ramos. IN As I see it [column]: Please spare those trees. Philippine Daily Inquirer.
Citazione stile Chigago Style (17a edizione)Cruz, Neal H. "To Vigilar Ramos. IN As I See It [column]: Please Spare Those Trees." Philippine Daily Inquirer 1998.
Citatione MLA (9a ed.)Cruz, Neal H. "To Vigilar Ramos. IN As I See It [column]: Please Spare Those Trees." Philippine Daily Inquirer, 1998.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.