Cahiles-Magkilat, B. PH infra drive cited in 2018 study. IN Business News. Manila Bulletin.
Lua i Stíl Chicago (17ú heag.)Cahiles-Magkilat, Bernie. "PH Infra Drive Cited in 2018 Study. IN Business News." Manila Bulletin .
Lua MLA (9ú heag.)Cahiles-Magkilat, Bernie. "PH Infra Drive Cited in 2018 Study. IN Business News." Manila Bulletin, .
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.