Russwurm, L. H., & Sommerville, E. (1974). Man's natural environment: A systems approach. Duxbury Press.
芝加哥风格引文Russwurm, Lorne H., 与 Edward Sommerville. Man's Natural Environment: A Systems Approach. North Scituate, Mass.: Duxbury Press, 1974.
MLA引文Russwurm, Lorne H., 与 Edward Sommerville. Man's Natural Environment: A Systems Approach. Duxbury Press, 1974.
警告：这些引文格式不一定是100％准确.