This session of the course was written by Anna Page on behalf of the Free Learning team at The Open University.
Except for third party materials and otherwise stated (see terms and conditions), this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence.
Images
Figure 1: Source: How to Attribute Creative Commons Photos, by FOTER, CC BY-SA 3.0
Figure 2: by Bryan Mathers http://bryanmathers.com/ CC BY ND
Figure 3: Stephen Craven CC-BY-SA-2.0 as displayed on http://www.geograph.org.uk/photo/4999640
Every effort has been made to contact copyright owners. If any have been inadvertently overlooked, the publishers will be pleased to make the necessary arrangements at the first opportunity.
OpenLearn - 4 Using existing free content Except for third party materials and otherwise, this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence, full copyright detail can be found in the acknowledgements section. Please see full copyright statement for details.