Hubert, Jules Deschamps. "Burkina Faso". Encyclopædia Britannica. Encyclopædia Britannica, Inc. Archived from the original on 2019-04-09. Retrieved 9 April 2019.
Hubert, Jules Deschamps. "Burkina Faso". Encyclopædia Britannica. Encyclopædia Britannica, Inc. Archived from the original on 2019-04-09. Retrieved 9 April 2019.