APA
Fair, Geyer & Okun. (1968). Water and Waste Water Engineering. New York: John Willey & Sons.
Chicago
Fair, Geyer and Okun. 1968. Water and Waste Water Engineering. New York: John Willey & Sons.
Harvard
Fair, Geyer and Okun. (1968). Water and Waste Water Engineering. New York: John Willey & Sons.
MLA
Fair, Geyer and Okun. Water and Waste Water Engineering. New York: John Willey & Sons. 1968.