license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use
Joseph Melchior, Die Gemeindewappen des Kantons Obwalden. In: Schweizer Wappen und Fahnen, Heft 5, Zug/Luzern 1999, S. 32–35 English Wikimedia username: