Kummer, D. M. (1984). Upland degradation and attempts at upland development in the Philippines. Forestry Development Center, UPLB College of Forestry.
Citazione stile Chigago Style (17a edizione)Kummer, David M. Upland Degradation and Attempts at Upland Development in the Philippines. College, Laguna: Forestry Development Center, UPLB College of Forestry, 1984.
Citatione MLA (9a ed.)Kummer, David M. Upland Degradation and Attempts at Upland Development in the Philippines. Forestry Development Center, UPLB College of Forestry, 1984.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.