David, R. J. (1999). The World of the six billion baby. IN At large [column]. Philippine Daily Inquirer.
Chicago-referens (17:e uppl.)David, Ring Jimenez. "The World of the Six Billion Baby. IN At Large [column]." Philippine Daily Inquirer 1999.
MLA-referens (9:e uppl.)David, Ring Jimenez. "The World of the Six Billion Baby. IN At Large [column]." Philippine Daily Inquirer, 1999.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.