Lua APA (7ú heag.)

NASH EDWARD L. (1988). DIRECT MARKETING: STRATEGY,PLANNING ,EXECUTION (2.). MCGRAW-HILL.

Lua i Stíl Chicago (17ú heag.)

NASH EDWARD L. DIRECT MARKETING: STRATEGY,PLANNING ,EXECUTION. 2. NEW YORK: MCGRAW-HILL, 1988.

Lua MLA (9ú heag.)

NASH EDWARD L. DIRECT MARKETING: STRATEGY,PLANNING ,EXECUTION. 2. MCGRAW-HILL, 1988.

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