Cita APA (7th ed.)

Garrity, D. P. (1991). The upland ecosystem in the Philippines: Alternatives for sustainable farming and forestry. s.n.

Cita Chicago (17th ed.)

Garrity, Dennis P. The Upland Ecosystem in the Philippines: Alternatives for Sustainable Farming and Forestry. [S.l: s.n, 1991.

Cita MLA (9th ed.)

Garrity, Dennis P. The Upland Ecosystem in the Philippines: Alternatives for Sustainable Farming and Forestry. s.n, 1991.