[1]
J. F. Humphreys, A course in group theory, vol. Oxford science publications. Oxford: Oxford University Press, 1996.
[2]
R. B. J. T. Allenby, Rings, fields and groups: an introduction to abstract algebra, 2nd ed. London: Edward Arnold, 1991.
[3]
N. C. Carter and ebrary, Inc, Visual group theory, vol. Classroom resource materials. [Washington, D.C.]: Mathematical Association of America, 2009 [Online]. Available: http://site.ebrary.com/lib/aber/Doc?id=10722442
[4]
W. R. Scott, Group theory. New York: Dover, 1987.