Philippines. Department of Environment and Natural Resources. Planning and Policy Studies Office. (2001). The electronic edition of environment and natural resources policy issuances (1996-2000) (Release 1.). DENR.
芝加哥风格引文Philippines. Department of Environment and Natural Resources. Planning and Policy Studies Office. The Electronic Edition of Environment and Natural Resources Policy Issuances (1996-2000). Release 1. Quezon City: DENR, 2001.
MLA引文Philippines. Department of Environment and Natural Resources. Planning and Policy Studies Office. The Electronic Edition of Environment and Natural Resources Policy Issuances (1996-2000). Release 1. DENR, 2001.
警告：这些引文格式不一定是100％准确.