Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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