Lua APA (7ú heag.)

NASH EDWARD L EDT. (1984). DIRECT MARKETING HANDBOOK. MCGRAW-HILL.

Lua i Stíl Chicago (17ú heag.)

NASH EDWARD L EDT. DIRECT MARKETING HANDBOOK. NEW YORK: MCGRAW-HILL, 1984.

Lua MLA (9ú heag.)

NASH EDWARD L EDT. DIRECT MARKETING HANDBOOK. MCGRAW-HILL, 1984.

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