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Kaikki 4s julkaisut Robbie Kellman Baxter
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![Cover for Robbie Kellman Baxter · The Forever Transaction: How to Build a Subscription Model So Compelling, Your Customers Will Never Want to Leave (Paperback Book) [Ed edition] (2020)](https://imusic.b-cdn.net/images/item/original/701/9781260458701.jpg?robbie-kellman-baxter-2020-the-forever-transaction-how-to-build-a-subscription-model-so-compelling-your-customers-will-never-want-to-leave-paperback-book&class=scaled&v=1587378381)
![Cover for Robbie Kellman Baxter · The Membership Economy: Find Your Super Users, Master the Forever Transaction, and Build Recurring Revenue (Hardcover Book) [Ed edition] (2015)](https://imusic.b-cdn.net/images/item/original/327/9780071839327.jpg?robbie-kellman-baxter-2015-the-membership-economy-find-your-super-users-master-the-forever-transaction-and-build-recurring-revenue-hardcover-book&class=scaled&v=1647908788)