(2001). 21st century will transform: World population lesser pressure on the environment seen. Manila Bulletin.
Citazione stile Chigago Style (17a edizione)"21st Century Will Transform: World Population Lesser Pressure on the Environment Seen." Manila Bulletin 2001.
Citatione MLA (9a ed.)"21st Century Will Transform: World Population Lesser Pressure on the Environment Seen." Manila Bulletin, 2001.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.