APA
Eckenfelder W. W., Grau P., . (1998). Activated sludge process design and control. Lancaster: Technomic Publishing.
Chicago
Eckenfelder W Wesley, Grau Petr, . 1998. Activated sludge process design and control. Lancaster: Technomic Publishing.
Harvard
Eckenfelder W. W., Grau P., . (1998). Activated sludge process design and control. Lancaster: Technomic Publishing.
MLA
Eckenfelder W Wesley, Grau Petr, . Activated sludge process design and control. Lancaster: Technomic Publishing. 1998.