Although this image is subject to copyright, it is covered by US fair use laws because:

1. it is a photo of an influential text, produced before 1940.
2. The image is only being used in the article about Cissy van Marxveldt for informational and educational purposes.
3. its inclusion in the article adds significantly to the article because it identifies the subject of this and other articles linked to it in a manner that mere prose cannot, and meets all criteria in WP:NFCC.
4. The image is the primary means of visual identification of the article topic.
5. The image is only a small portion of the commercial product.
6. The use of this image will not affect the value of the original work.
7. The use of this image will not limit the copyright holder's rights or ability to distribute or make a profit from the original. In particular, copies could not be used to make illegal copies of the book.
8. The image is a low resolution image of the book cover, in an inferior graphics format (JPEG).
9. The image is not replaceable with an uncopyrighted or freely copyrighted image of comparable educational value.