Gaya APA
Benefield, L., D., Randall, C., W. (1980).
Biological process design for wastewater treatment .
London:
Prentice - Hall.
Gaya MLA
Benefield, L., D., Randall, C., W..
Biological process design for wastewater treatment.
London:
Prentice - Hall,
1980.
Text.