Esguerra, C. V. (2004). Cops to wear Kotong pins in effort to stop extortion. Philippine Daily Inquirer.
Chicago-referens (17:e uppl.)Esguerra, Christian V. "Cops to Wear Kotong Pins in Effort to Stop Extortion." Philippine Daily Inquirer 2004.
MLA-referens (9:e uppl.)Esguerra, Christian V. "Cops to Wear Kotong Pins in Effort to Stop Extortion." Philippine Daily Inquirer, 2004.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.