Lua APA (7ú heag.)

JOHNSON EUGENE M. (1994). SALES MANAGEMENT: CONCEPTS, PRACTICES, AND CASES (2ND.). MCGRAW-HILL.

Lua i Stíl Chicago (17ú heag.)

JOHNSON EUGENE M. SALES MANAGEMENT: CONCEPTS, PRACTICES, AND CASES. 2ND. NEW YORK: MCGRAW-HILL, 1994.

Lua MLA (9ú heag.)

JOHNSON EUGENE M. SALES MANAGEMENT: CONCEPTS, PRACTICES, AND CASES. 2ND. MCGRAW-HILL, 1994.

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