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![2017 Principles and Practice of CBT-I-Cognitive Behavioral Therapy for Insomnia - Donn Posner](https://wsolib.com/wp-content/uploads/2023/05/2017-Principles-and-Practice-of-CBT-Cognitive-Behavioral-Therapy-for-Insomnia.jpg)
2017 Principles and Practice of CBT-I-Cognitive Behavioral Therapy for Insomnia – Donn Posner , Michael Perlis and Jason Ellis
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