HAFSTROM, J. E. (1967). Introduction to analysis and abstract algebra. Saunders.
Chicago-čujuhus (17. p.)HAFSTROM, John E. Introduction to Analysis and Abstract Algebra. London: Saunders, 1967.
MLA-čujuhus (9. p.)HAFSTROM, John E. Introduction to Analysis and Abstract Algebra. Saunders, 1967.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.