ハマー族
Vanishing Africa. Text and photographs by Gianni Giansanti; ethnographic introductions by Paolo Novaresio. Translated from Italian. With audio CD. Vercelli, Italy: White Star. ISBN 88-544-0006-8.
Strecker, Ivo A. (1988). The Social Practice of Symbolization: An Anthropological Analysis. Monographs on Social Anthropology, no. 60. London; Atlantic Highlands, New Jersey: Athlone Press. ISBN 0-485-19557-7.