(1996). Some plant species sensitive to air pollution. DENR.
Citazione stile Chigago Style (17a edizione)Some Plant Species Sensitive to Air Pollution. Quezon City, Phils: DENR, 1996.
Citatione MLA (9a ed.)Some Plant Species Sensitive to Air Pollution. DENR, 1996.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.