lewis, h. G. Effective E-Mail Marketing The Complete Guide to Creating Successful Campaigns. American management association.
Chicago Style (17th ed.) Citationlewis, herschell Gordon. Effective E-Mail Marketing The Complete Guide to Creating Successful Campaigns. American management association.
MLA (8th ed.) Citationlewis, herschell Gordon. Effective E-Mail Marketing The Complete Guide to Creating Successful Campaigns. American management association.
Warning: These citations may not always be 100% accurate.