Untrauer, R. E. (1970). Design requirements for cast iron soil pipe. Engineering Research Institute, Iowa State University.
芝加哥风格引文Untrauer, Raymond Ernest. Design Requirements for Cast Iron Soil Pipe. Ames, Iowa: Engineering Research Institute, Iowa State University, 1970.
MLA引文Untrauer, Raymond Ernest. Design Requirements for Cast Iron Soil Pipe. Engineering Research Institute, Iowa State University, 1970.
警告：这些引文格式不一定是100％准确.