APA引文

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

Trích dẫn kiểu Chicago

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

MLA引文

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

警告：这些引文格式不一定是100％准确.