Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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