(1967). Sewage treatment plant design. Washington, D.C: Water Pollution Control Federation.
Παραπομπή Chicago StyleSewage Treatment Plant Design. Washington, D.C: Water Pollution Control Federation, 1967.
Παραπομπή MLASewage Treatment Plant Design. Washington, D.C: Water Pollution Control Federation, 1967.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.