Cita APA (7th ed.)

Environmental Center of the Philippines Foundation Incorporation & Department of Environment and Natural Resources. (1991). Manual for the preparation of an area ecological profile. [s.n.].

Cita Chicago (17th ed.)

Environmental Center of the Philippines Foundation Incorporation i Department of Environment and Natural Resources. Manual for the Preparation of an Area Ecological Profile. [s.l]: [s.n.], 1991.

Cita MLA (9th ed.)

Environmental Center of the Philippines Foundation Incorporation i Department of Environment and Natural Resources. Manual for the Preparation of an Area Ecological Profile. [s.n.], 1991.