Leftwich, R. H. An introduction to economic thinking [by] Richard H. Leftwich.
芝加哥风格引文Leftwich, Richard H. An Introduction to Economic Thinking [by] Richard H. Leftwich. New York, Holt, Rinehart and Winston [1969].
MLA引文Leftwich, Richard H. An Introduction to Economic Thinking [by] Richard H. Leftwich.
警告：这些引文格式不一定是100％准确.