Cita APA (7th ed.)
The Open University. (2007). Environmental control and public health: Block 3 water pollution control. The Open University.
Cita Chicago (17th ed.)
The Open University. Environmental Control and Public Health: Block 3 Water Pollution Control. United Kingdom: The Open University, 2007.
Cita MLA (9th ed.)
The Open University. Environmental Control and Public Health: Block 3 Water Pollution Control. The Open University, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.