Lua APA (7ú heag.)

PEPPERS DON. (2004). MANAGING CUSTOMER RELATIONSHIP. JOHN WILEY AND SONS.

Lua i Stíl Chicago (17ú heag.)

PEPPERS DON. MANAGING CUSTOMER RELATIONSHIP. NEW JERSEY: JOHN WILEY AND SONS, 2004.

Lua MLA (9ú heag.)

PEPPERS DON. MANAGING CUSTOMER RELATIONSHIP. JOHN WILEY AND SONS, 2004.

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