^Overfield, Theresa (1985). Biologic variation in health and illness: race, age, and sex differences. Menlo Park, Calif: Addison-Wesley, Nursing Division. hlm. 46. ISBN978-0-201-12810-9. ... most common type in Whites and Blacks is dark brown and moist. Dry wax, most common in Orientals and Native Americans, is gray and dry. It is flaky and may form a thin mass that lies in the ear canal.
