1. Aubin, E. 1906. Morocco of to-day. J. M. Dent & Co., London.
2. Berrada, M. 1972. Etude de la composition de l’huile d’argan. Al Awamia 42:1–14.
3. Bois, D. 1934. Les plantes alimentaires chez tous les peuples et a traves les ages, histoire, utilisation, culture. Vol. III: Plantes a épices, a aromates, a condiments. Paul Lechevalier, Paris.
4. Boulos, L. 1983. Medicinal plants of North Africa. Reference Publications, Algonac, Michigan.
5. Chenier, M. 1788. The present state of the Empire of Morocco. G. G. J. and J. Robinson, London. [Trans. from French.]