Citazione Stile APA (7a Edizione)

Philippines (Republic). Bureau of Public Works and Communication & Irrigation Service Unit. First aid for irrigators. [s.n.

Citazione stile Chigago Style (17a edizione)

Philippines (Republic). Bureau of Public Works and Communication e Irrigation Service Unit. First Aid for Irrigators. Manila: [s.n.

Citatione MLA (9a ed.)

Philippines (Republic). Bureau of Public Works and Communication e Irrigation Service Unit. First Aid for Irrigators. [s.n.