GUDGEIRSSON, Baldur. 3Cores in Business : Core No. 1 : Business Innovation : Rethinking your Business and Strategic Marketing to Build a Robust Company. 2nd Edition. [Edmonton] : Iceberg Publishing House, 2023. 384 s. ISBN 9798385702251. [Počet ex. : 1, z toho voľných 0, prezenčne 0]