Garrity, D. P. (1991). The upland ecosystem in the Philippines: Alternatives for sustainable farming and forestry. s.n.
Citazione stile Chigago Style (17a edizione)Garrity, Dennis P. The Upland Ecosystem in the Philippines: Alternatives for Sustainable Farming and Forestry. [S.l: s.n, 1991.
Citatione MLA (9a ed.)Garrity, Dennis P. The Upland Ecosystem in the Philippines: Alternatives for Sustainable Farming and Forestry. s.n, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.