One of the best examples of a mature permaculture farm in a temperate clima is Sepp Holzers farm Krameterhof in the Austian alps. Sepp Holzer has written a book where he explains permaculture by lots of examples from his own farm.
The Krameterhof is an intricate network of terraces, raised beds, ponds, waterways and tracks. And the place is a wonderfull contrast to the monoculture farms surrounding it.
The book covers everything from planning to implementing. It has an extensive chapter on growing fruit trees. It has lots of tips for building earth-shetered living spaces for animals and integrating them into the farm. There is also a chapter on growing and cultivating mushrooms. There is much informastion about the garden area, with vegetable platches and medical use of homegrown herbs. In addition Sepp Holzer also writes about how to make an income from the land.
There is also a section about projects done in other parts of the world. I particulary liked the examples of the earth works and the all the pond solutions. The plant list are also very helpful, for example the list of green manure crops.
Here is a video with Sepp Holzer at the Krameterhof: