U.S. Environmental Protection Agency. Enhanced coagulation and enhanced precipitative softening guidance manual.
芝加哥风格引文U.S. Environmental Protection Agency. Enhanced Coagulation and Enhanced Precipitative Softening Guidance Manual.
MLA引文U.S. Environmental Protection Agency. Enhanced Coagulation and Enhanced Precipitative Softening Guidance Manual.
警告:这些引文格式不一定是100%准确.