Von Sperling, M. (2007). Activated Sludge and Aerobic Biofilm Reactors. IWA Publishing.
Chicago-čujuhus (17. p.)Von Sperling, Marcos. Activated Sludge and Aerobic Biofilm Reactors. IWA Publishing, 2007.
MLA-čujuhus (9. p.)Von Sperling, Marcos. Activated Sludge and Aerobic Biofilm Reactors. IWA Publishing, 2007.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.