APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.