COMER JAMES M. (1991). SALES MANAGEMENT: PEOPLE AND PROFIT (WITH FLOPPY DISK). ALLYN AND BACON.
Lua i Stíl Chicago (17ú heag.)COMER JAMES M. SALES MANAGEMENT: PEOPLE AND PROFIT (WITH FLOPPY DISK). BOSTON: ALLYN AND BACON, 1991.
Lua MLA (9ú heag.)COMER JAMES M. SALES MANAGEMENT: PEOPLE AND PROFIT (WITH FLOPPY DISK). ALLYN AND BACON, 1991.
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