National Council of Churches in the Philippines. (1995). Environment trainors' manual. National Council of Churches in the Philippines, Program Unit on Ecology and Environmental Protection.
Παραπομπή σε μορφή Chicago (17η εκδ.)National Council of Churches in the Philippines. Environment Trainors' Manual. [Quezon City]: National Council of Churches in the Philippines, Program Unit on Ecology and Environmental Protection, 1995.
Παραπομπή σε μορφή MLA (9th εκδ.)National Council of Churches in the Philippines. Environment Trainors' Manual. National Council of Churches in the Philippines, Program Unit on Ecology and Environmental Protection, 1995.
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