The Theory of Infinite Soluble Groups. : Oxford University Press, 2004-08-19. Oxford Scholarship Online. 2007-09-01. Date Accessed 19 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198507284.001.0001/acprof-9780198507284>.
(2004-08-19). The Theory of Infinite Soluble Groups. : Oxford University Press. Retrieved 19 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198507284.001.0001/acprof-9780198507284.
The Theory of Infinite Soluble Groups. : Oxford University Press, 2004-08-19. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198507284.001.0001/acprof-9780198507284.
Lennox JC, Robinson DJS. The Theory of Infinite Soluble Groups. Oxford University Press; 2004. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780198507284.001.0001/acprof-9780198507284. Accessed May 19, 2013.