Marcel Weiher: iOS and macOS Performance Tuning: Cocoa, Cocoa Touch, Objective-C, and Swift. Addison-Wesley Professional, 2017, ISBN 978-0-13-308553-2 (google.com [abgerufen am 22. Dezember 2019]): „SceneKit and SpriteKit on the other hand are retained-mode APIs“
Alex Feldmeier: GUI Programming. In: UWP Computer Science and Software Engineering Technical Report. 12. Oktober 2013, abgerufen am 22. Dezember 2019: „Retained mode has been the standard for years. Just about every GUI is in retained mode.“