Cita APA

(1976). Agronomic - economic research on tropical soils. Annual report for 1975. USA: U.S.Agency for International Development.

Citación estilo Chicago

Agronomic - Economic Research On Tropical Soils. Annual Report for 1975. USA: U.S.Agency for International Development, 1976.

Cita MLA

Agronomic - Economic Research On Tropical Soils. Annual Report for 1975. USA: U.S.Agency for International Development, 1976.