STANDARD. (1998). Standard methods for the examination of water and wastewater.-- ed.20. APHA.
Chicago Style (17th ed.) CitationSTANDARD. Standard Methods for the Examination of Water and Wastewater.-- Ed.20. Maryland: APHA, 1998.
MLA引文STANDARD. Standard Methods for the Examination of Water and Wastewater.-- Ed.20. APHA, 1998.
警告:這些引文格式不一定是100%准確.