Greenwood, M. J. (1981). Migration and Economic Growth in the United States. ELSEVIER.
芝加哥风格引文Greenwood, Michael J. Migration and Economic Growth in the United States. ELSEVIER, 1981.
MLA引文Greenwood, Michael J. Migration and Economic Growth in the United States. ELSEVIER, 1981.
警告：这些引文格式不一定是100％准确.