Philippines. Environmental Management Bureau. (1980). Directory of environmental legislations. Environmental Management Bureau.
Citazione stile Chigago Style (17a edizione)Philippines. Environmental Management Bureau. Directory of Environmental Legislations. [Quezon City]: Environmental Management Bureau, 1980.
Citatione MLA (9a ed.)Philippines. Environmental Management Bureau. Directory of Environmental Legislations. Environmental Management Bureau, 1980.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.