1.
Humphreys JF. A course in group theory. Oxford: Oxford University Press; 1996.
2.
Allenby RBJT. Rings, fields and groups: an introduction to abstract algebra. 2nd ed. London: Edward Arnold; 1991.
3.
Carter NC, ebrary, Inc. Visual group theory [Internet]. [Washington, D.C.]: Mathematical Association of America; 2009. Available from: http://site.ebrary.com/lib/aber/Doc?id=10722442
4.
Scott WR. Group theory. New York: Dover; 1987.