Sopper, W. E. (1993). Municipal sludge use in land reclamation. Lewis Publishers.
芝加哥风格引文Sopper, William E. Municipal Sludge Use in Land Reclamation. Boca Raton: Lewis Publishers, 1993.
MLA引文Sopper, William E. Municipal Sludge Use in Land Reclamation. Lewis Publishers, 1993.
警告：这些引文格式不一定是100％准确.