linsel, h., & sack, k. (1965). theoretical problems of investment planning. National Planning Institute.
芝加哥风格引文linsel, hermann, 与 kurt sack. Theoretical Problems of Investment Planning. cairo: National Planning Institute, 1965.
MLA引文linsel, hermann, 与 kurt sack. Theoretical Problems of Investment Planning. National Planning Institute, 1965.
警告：这些引文格式不一定是100％准确.