Clark, G., Forbes, D., & Johns, G. (1975). On the concept of welfare. Institute of British Geographers.
芝加哥风格引文Clark, G., D. Forbes, 与 G. Johns. On the Concept of Welfare. Institute of British Geographers, 1975.
MLA引文Clark, G., et al. On the Concept of Welfare. Institute of British Geographers, 1975.
警告：这些引文格式不一定是100％准确.