Halm, G. N. (1968). Economic systems: A comparative analysis (3rd ed.). Holt, Rinehart and Winston.
芝加哥风格引文Halm, George Nikolaus. Economic Systems: A Comparative Analysis. 3rd ed. New York: Holt, Rinehart and Winston, 1968.
MLA引文Halm, George Nikolaus. Economic Systems: A Comparative Analysis. 3rd ed. Holt, Rinehart and Winston, 1968.
警告：这些引文格式不一定是100％准确.