1. Actman, Jani 2017 Does Destroying Ivory Save Elephants? Experts Weigh in, 2 August. Wildlife Watch, National Geographic <
https://news.nationalgeographic.com/2017/08/wildlife-watch-ivory-crush-elephant-poaching
>. Accessed 22 July 2019.
2. Adams, Jonathan S., and Thomas O. McShane 1997 The Myth of Wild Africa: Conservation without Illusion. University of California Press, Berkeley.
3. Alpers, Edward A. 1969 Trade, State, and Society among the Yao in the Nineteenth Century. Journal of African History 10(3):405–420.
4. Alpers, Edward A. 1975 Ivory and Slaves: Changing Pattern of International Trade in East Central Africa to the Later Nineteenth Century. University of California Press, Berkeley.
5. Alpers, Edward A. 1995 The Ivory Trade in Africa: A Historical Overview. In Elephant: The Animal and Its Ivory in African Culture, Doran H. Ross, editor, pp. 349–363. University of California Press, Berkeley.