APA (7. basım) Alıntı

Sigua, R. G. (2000). The state of road safety in the Philippines. Public Policy.

Chicago Style (17. basım) Atıf

Sigua, Ricardo G. "The State of Road Safety in the Philippines." Public Policy 2000.

MLA (9th ed.) Atıf

Sigua, Ricardo G. "The State of Road Safety in the Philippines." Public Policy, 2000.