This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Sigmund Freud Der Witz und seine Beziehung zum Unbewussten . en Frontpage of the original edition of Sigmund Freud's Der Witz und seine Beziehung zum Unbewussten Franz Deuticke Leipzig und Wien org Franz Deuticke other versions cczero Uploaded with Psychology books book covers single pages etc
Page 2023 Free-images.com. All images are Public Domain