What is the author's style in Chronicles of the Crusades by Jean de Joinville?

In the first book, the writer, Villehardouin, speaks mostly in the third person, but occasionally speaks in the first person. This shift occurs because, while some of his work is taken from other books written about the Crusade, some is also written from his own personal experiences. His use of these perspectives is useful, in that the perspective helps to show the reader whether the information is first or second hand.