Dyfyniad APA
ebrary, Inc, Yudkin, M., Gutzman, A. D., & Holland, A. (2002). Best practices in marketing with email newsletters: For marketers and publishers. MarketingSherpa, Inc..
Dyfyniad Arddull Chicago
ebrary, Inc, Marcia Yudkin, Alexis D. Gutzman, and Anne Holland. Best Practices in Marketing with Email Newsletters: For Marketers and Publishers. Portsmouth, R.I.: MarketingSherpa, Inc., 2002.
Dyfyniad MLA
ebrary, Inc, et al. Best Practices in Marketing with Email Newsletters: For Marketers and Publishers. MarketingSherpa, Inc., 2002.
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