APA引文

Roberts, R. A. J. (2005). Insurance of crops in developing countries. Rome: Food and Agirculture Organization of the United Nations.

Trích dẫn kiểu Chicago

Roberts, R. A. J. Insurance of Crops in Developing Countries. Rome: Food and Agirculture Organization of the United Nations, 2005.

MLA引文

Roberts, R. A. J. Insurance of Crops in Developing Countries. Rome: Food and Agirculture Organization of the United Nations, 2005.

警告：這些引文格式不一定是100％准確.