एपीए उद्धरण

 Hellawell, J. M. (1986).  Biological indicators of freshwater pollution and environmental management.  Elsevier Applied Science Publishers.

शिकागो स्टाइल उद्धरण

 Hellawell, J. M.  Biological Indicators of Freshwater Pollution and Environmental Management.  Elsevier Applied Science Publishers, 1986.

एमएलए उद्धरण

 Hellawell, J. M.  Biological Indicators of Freshwater Pollution and Environmental Management.  Elsevier Applied Science Publishers, 1986.