Shively, G. E. (1996). Land degradation, soil conservation and risk: Evidence from a dynamic model of Philippine upland agriculture. The Claremont Graduate University.
Lua i Stíl Chicago (17ú heag.)Shively, Gerald E. Land Degradation, Soil Conservation and Risk: Evidence from a Dynamic Model of Philippine Upland Agriculture. Ann Arbor: The Claremont Graduate University, 1996.
Lua MLA (9ú heag.)Shively, Gerald E. Land Degradation, Soil Conservation and Risk: Evidence from a Dynamic Model of Philippine Upland Agriculture. The Claremont Graduate University, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.