Cordova, C. (2020). Cebu City contract tracers have a lot of catching up to do. Manila Bulletin.
Chicago-referens (17:e uppl.)Cordova, Calvin. "Cebu City Contract Tracers Have a Lot of Catching Up to Do." Manila Bulletin 2020.
MLA-referens (9:e uppl.)Cordova, Calvin. "Cebu City Contract Tracers Have a Lot of Catching Up to Do." Manila Bulletin, 2020.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.