Lipsey, R. G., Stilwell, J. A., & Rittig-Baumhaus, G. (1971). Einführung in die positive Ökonomie: An Introduction to positive economics. Kiepenheuer u. Witsch.
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芝加哥风格引文
Lipsey, Richard G., John A. Stilwell, 与 Gertrud Rittig-Baumhaus. Einführung in Die Positive Ökonomie: An Introduction to Positive Economics. Köln: Kiepenheuer u. Witsch, 1971.
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MLA引文
Lipsey, Richard G., et al. Einführung in Die Positive Ökonomie: An Introduction to Positive Economics. Kiepenheuer u. Witsch, 1971.
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警告：这些引文格式不一定是100％准确.