Lua APA (7ú heag.)

LEWIS HERSCHELL GORDON. (2002). EFFECTIVE E-MAIL MARKETING. AMACOM.

Lua i Stíl Chicago (17ú heag.)

LEWIS HERSCHELL GORDON. EFFECTIVE E-MAIL MARKETING. NEW YORK: AMACOM, 2002.

Lua MLA (9ú heag.)

LEWIS HERSCHELL GORDON. EFFECTIVE E-MAIL MARKETING. AMACOM, 2002.

Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.