Citazione Stile APA (7a Edizione)

Gasgonia, D. Z. (2021). Environmental law and policies (2021 edition.). University of the Philippines Law Center.

Citazione stile Chigago Style (17a edizione)

Gasgonia, Donna Zapa. Environmental Law and Policies. 2021 edition. Quezon City: University of the Philippines Law Center, 2021.

Citatione MLA (9a ed.)

Gasgonia, Donna Zapa. Environmental Law and Policies. 2021 edition. University of the Philippines Law Center, 2021.