![Cheerfulness as a Life Power: A Self-Help Book About the Benefits of Laughter and Humor Boekomslag van Cheerfulness as a Life Power: A Self-Help Book About the Benefits of Laughter and Humor](https://prod-bb-images.akamaized.net/book-covers/coverimage-9782291059240-bookwire-2021-03-31.jpg?w=640)
Cheerfulness as a Life Power: A Self-Help Book About the Benefits of Laughter and Humor