Puga, D., & Venables, A. (1997). Preferential Trading Arrangements and Industrial Location.
芝加哥风格引文Puga, D., 与 A. Venables. Preferential Trading Arrangements and Industrial Location. 1997.
MLA引文Puga, D., 与 A. Venables. Preferential Trading Arrangements and Industrial Location. 1997.
警告：这些引文格式不一定是100％准确.