Lua APA (7ú heag.)

STILL RICHARD R. (2005). SALES MANAGEMENT (5TH.). PRENTICE HALL OF INDIA.

Lua i Stíl Chicago (17ú heag.)

STILL RICHARD R. SALES MANAGEMENT. 5TH. NEW DELHI: PRENTICE HALL OF INDIA, 2005.

Lua MLA (9ú heag.)

STILL RICHARD R. SALES MANAGEMENT. 5TH. PRENTICE HALL OF INDIA, 2005.

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