The author of the book Lehtikeisari, Jyrki Hämäläinen, is accused of citing other writers' text without giving them the credit or mentioning his sources. The possible copyright violation by Hämäläinen, who was the editor in chief for a long time at the popular teenage music magazine Suosikki, has already been discussed by journalists and in the culture section of the largest Finnish newspaper Helsingin Sanomat, according to journalist Helena Pilke who reviews this book.
Yenayer blogs about the citing situation in French blogs, and apparently, the "rule" of citing isn't well respected there. Those of you who find this topic interesting, worrying or perhaps see it as a fast lane to stardom and celebrity, have a look at the movie Shattered Glass. It presents another angle to the citing principle as the movie is about citing non-existing people, rather than stealing other people's text. I saw it and I liked the story.