LEWIS HERSCHELL GORDON. (2002). EFFECTIVE E-MAIL MARKETING. AMACOM.
Chicago-čujuhus (17. p.)LEWIS HERSCHELL GORDON. EFFECTIVE E-MAIL MARKETING. NEW YORK: AMACOM, 2002.
MLA-čujuhus (9. p.)LEWIS HERSCHELL GORDON. EFFECTIVE E-MAIL MARKETING. AMACOM, 2002.
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