APA aipamena

(1980). Agronomic - economic research on soils of the tropics. 1978-1979 Report. USA: U.S.Agency for International Development.

Chicago Style aipamena

Agronomic - Economic Research On Soils of the Tropics. 1978-1979 Report. USA: U.S.Agency for International Development, 1980.

MLA aipamena

Agronomic - Economic Research On Soils of the Tropics. 1978-1979 Report. USA: U.S.Agency for International Development, 1980.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.