Shmidt, O. I. (1966). Abstract theory of groups. W. H. Freeman.
Dyfyniad Arddull ChicagoShmidt, Otto IUl'evich. Abstract Theory of Groups. San Francisco: W. H. Freeman, 1966.
Dyfyniad MLAShmidt, Otto IUl'evich. Abstract Theory of Groups. W. H. Freeman, 1966.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.