Integrated Environmental Management for Sustainable Development Programme. (1998). Guidelines for the formulation of the strategic environmental plan (SEP). DENR-IEMSD.
Chicago Style aipamenaIntegrated Environmental Management for Sustainable Development Programme. Guidelines for the Formulation of the Strategic Environmental Plan (SEP). Quezon City: DENR-IEMSD, 1998.
MLA aipamenaIntegrated Environmental Management for Sustainable Development Programme. Guidelines for the Formulation of the Strategic Environmental Plan (SEP). DENR-IEMSD, 1998.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.