Lua APA (7ú heag.)
The Open University. (2007). Environmental control and public health: Block 3 water pollution control. The Open University.
Lua i Stíl Chicago (17ú heag.)
The Open University. Environmental Control and Public Health: Block 3 Water Pollution Control. United Kingdom: The Open University, 2007.
Lua MLA (9ú heag.)
The Open University. Environmental Control and Public Health: Block 3 Water Pollution Control. The Open University, 2007.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.