KOPČÁKOVÁ, Janka. Basic Differences Between Advertising and Sales Promotion in the Communication Mix. In Trends in Application of Statistical Methods for Quality Improvement XVIII. (2022). International Scientific Conference. Trends in Application of Statistical Methods for Quality Improvement XVIII. (2022) : Reviewed Proceeding of Posts from an 18. International Scientific Conference, May 18th – 20th, 2022, Košice - Rajecké Teplice. - Košice : KKM PHF, 2022. ISBN 978-80-225-4975-2, p. 7 online.