E., H. (1967). Trends in the World Demand for Primary Products & Their Impli-cations for the Exports of De-veloping Countries. The Institute of National Planning.
芝加哥风格引文E., Hammam. Trends in the World Demand for Primary Products & Their Impli-cations for the Exports of De-veloping Countries. Cairo: The Institute of National Planning, 1967.
MLA引文E., Hammam. Trends in the World Demand for Primary Products & Their Impli-cations for the Exports of De-veloping Countries. The Institute of National Planning, 1967.
警告：这些引文格式不一定是100％准确.