13.6 References and Attributions
References
Throughout the chapter, there are in text links to journal articles, web sources, and books when referenced in text.
Attributions
This chapter includes original work authored by Shelly Volsche.
NPR Interview with Frans de Waal used in accordance with the Use of Content: Conditions and Acknowledgements.
Photo Attributions
Man and woman arguing on subway car: “Lisboa #15” by Thomas Leuthard is licensed under CC BY 2.0
Lion cubs yawning: “Yawning cubs” by Tambako the Jaguar is licensed under CC BY-ND 2.0
WWI soldiers posing: “great-grandpa joe in world war one” by is licensed under CC BY-NC 2.0
The Christmas Truce of 1914: “Christmas Truce 1914.png” by Harold B Robson is licensed under Public Domain