Janotta, S. (2014). Loyalty cards in the apparel industry in Germany and Spain: Is the implementation of a global marketing approach reasonable when operating both in a southern and a northern European country? Anchor Academic Publishing.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Janotta, Sarah-Mailin. Loyalty Cards in the Apparel Industry in Germany and Spain: Is the Implementation of a Global Marketing Approach Reasonable When Operating Both in a Southern and a Northern European Country? Hamburg: Anchor Academic Publishing, 2014.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Janotta, Sarah-Mailin. Loyalty Cards in the Apparel Industry in Germany and Spain: Is the Implementation of a Global Marketing Approach Reasonable When Operating Both in a Southern and a Northern European Country? Anchor Academic Publishing, 2014.