Minneapolis. Public Library. Environmental Conservation Library. (1974). ECOL book catalog: Environmental conservation library. American Library Association.
芝加哥风格引文Minneapolis. Public Library. Environmental Conservation Library. ECOL Book Catalog: Environmental Conservation Library. Chicago: American Library Association, 1974.
MLA引文Minneapolis. Public Library. Environmental Conservation Library. ECOL Book Catalog: Environmental Conservation Library. American Library Association, 1974.
警告：这些引文格式不一定是100％准确.