↑ Schweitzer, Marlis (tháng 7 năm 2005). “"The Mad Search for Beauty": Actresses' Testimonials, the Cosmetics Industry, and the "Democratization of Beauty"”. The Journal of the Gilded Age and Progressive Era 4 (3): 255–292. JSTOR25144403.
↑ By the Zuni people, according to Matilda Coxe Stevenson, Ethnobotany of the Zuni Indians. SI-BAE Annual Report #30 (1915), p. 83
