Diana Gabaldon (2015). “The Outlander Series Bundle: Books 5, 6, 7, and 8: The Fiery Cross, A Breath of Snow and Ashes, An Echo in the Bone, Written in My Own Heart's Blood”, p.12, Delacorte Press
Diana Gabaldon (2015). “The Outlander Series Bundle: Books 1, 2, 3, and 4: Outlander, Dragonfly in Amber, Voyager, Drums of Autumn”, p.1761, Delacorte Press