Piad, T. J. C. (2025). SMC: Unified payment for expressways unlikely without cashless toll collection. Philippine Daily Inquirer.
Chicago-viite (17. p.)Piad, Tyrone Jasper C. "SMC: Unified Payment for Expressways Unlikely Without Cashless Toll Collection." Philippine Daily Inquirer 2025.
MLA-viite (9. p.)Piad, Tyrone Jasper C. "SMC: Unified Payment for Expressways Unlikely Without Cashless Toll Collection." Philippine Daily Inquirer, 2025.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.