Acknowledgements

This course was written by Jackie Tuck.

Except for third party materials and otherwise stated (see terms and conditions [Tip: hold Ctrl and click a link to open it in a new tab. (Hide tip)] ), this content is made available under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 Licence.

The material acknowledged below is Proprietary and used under licence (not subject to Creative Commons Licence). Grateful acknowledgement is made to the following sources for permission to reproduce material in this free course:

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.

Images

Course Image: courtesy Jackie Tuck.

Figure 1: © The Open University

Figure 2: © unknown

Figure 3: courtesy Jackie Tuck

Figure 4: ilbusca/Getty Images

Figure 5: © The Open University

Figure 8: © akg-images.

Figure 11: ©_Gearsolid/iStockphoto.com

AV

Video: Section 7.1: © The Open University

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