Cristobal, J. M. (2011). Aduana de Iloilo. IN Urban planning : Iloilo [column]: The historic Iloilo customs building awaits a new assignment. BluPrint.
Chicago-viite (17. p.)Cristobal, Jennifer M. "Aduana De Iloilo. IN Urban Planning : Iloilo [column]: The Historic Iloilo Customs Building Awaits a New Assignment." BluPrint 2011.
MLA-viite (9. p.)Cristobal, Jennifer M. "Aduana De Iloilo. IN Urban Planning : Iloilo [column]: The Historic Iloilo Customs Building Awaits a New Assignment." BluPrint, 2011.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.