APA (7 ম সংস্করণ) উদ্ধৃতি

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.].

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

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

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

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