STAFFORD L W T. (1981). BUSINESS MATHEMATICS (2ND.). MACDONALD & EVANS.
Chicago-čujuhus (17. p.)STAFFORD L W T. BUSINESS MATHEMATICS. 2ND. LONDON: MACDONALD & EVANS, 1981.
MLA-čujuhus (9. p.)STAFFORD L W T. BUSINESS MATHEMATICS. 2ND. MACDONALD & EVANS, 1981.
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