APA引文

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

Trích dẫn kiểu Chicago

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

MLA引文

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

警告：這些引文格式不一定是100％准確.