Elements de mathematique algebre : chapitre 8 / N. Bourbaki
Springer, 2012
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Teori ring dan modul
Sri Wahyuni, Indah Emilia Wijayanti, Dian Ariesta Yuwaningsih, Ari Dwi Hartanto
Gadjah Mada University Press, 2016
 Buku Teks
Cohn, P.M.
Free rings and their relations
Academic Press, 1985
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Passman, Donald S.
A course in ring theory / Donald S. Passman
Wadsworth & Brooks, 1991
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Szasz, F.A.
Radicals of rings
John Wiley & Sons, 1981
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