1. Hendry, Joy 1999, An Introduction to Social Anthropology, Macmillan, Basingstoke. (read ?Chapter 3: Gifts, exchange and reciprocity?)
2. Lee, Richard ?Eating Christmas in the Kalahari? (online) https://windward.hawaii.edu/facstaff/dagrossa-p/articles/EatingChristmas.pdf
3. Appadurai, Arjun ?Gift Trapped? https://magazine.uchicago.edu/9912/features/9912_gifts-print.html