Kaufmann, Fred H.
Burgess Publishing, 1969
Buku Teks
Fassett, Norman C.
University of Wisconsin Press, 1985
Buku Referensi
the Subcommitte in Operation of Wastewater Treatment Plants
Water Pollution Control Federation, 1976
Buku Referensi
McGraw-Hill, 1961
Buku Referensi
Lawson, Anton E., author
McGraw-Hill, 1995
Buku Teks