Clark, J. M. (1967). Preface to social economics: Essays on economic theory and social problems. Kelley.
芝加哥风格引文Clark, John Maurice. Preface to Social Economics: Essays on Economic Theory and Social Problems. New York: Kelley, 1967.
MLA引文Clark, John Maurice. Preface to Social Economics: Essays on Economic Theory and Social Problems. Kelley, 1967.
警告：这些引文格式不一定是100％准确.