EMBER, C. R., & EMBER, M. (1977). Anthropology.-- Ed.2. Prentice-Hall.

EMBER, Carol R., and Melvin EMBER. Anthropology.-- Ed.2. New Jersey: Prentice-Hall, 1977.

EMBER, Carol R., and Melvin EMBER. Anthropology.-- Ed.2. Prentice-Hall, 1977.