American Water Works Association (AWWA)
American Water Works Association, 1967
Buku Referensi
Artikel Jurnal
Wrede, Robert, author
McGraw-Hill, 2010
Buku Teks
Cantor, Abigail F., author
CRC Press, Taylor & Francis Group, 2018
Buku Teks
Newman, Melvin S., author
Macmillan, 1972
Buku Teks