Bertamini, M., Spooner, Alice and Hecht, H. (2004) The representation of naive knowledge about physics. In: Multidisciplinary studies of visual representations and interpretations. Elsevier, Amsterdam.
Smith, P.K., Sharp, S, Eslea, Mike J ORCID: 0000-0003-1273-0302 and Thompson, D. (2004) England : the Sheffield project. In: Bullying in schools ; how successful can interventions be. Cambridge University Press, Cambridge, pp. 99-125. ISBN 9780521528030
Wickens, Andrew (2004) Foundations of Biopsychology, 2nd ed. Prentice Hall, London. ISBN 0131971387