Levi, Scott Cameron, and Ron Sela. 2010. Islamic Central Asia: An Anthology of Historical Sources. Indiana University Press.

Nijman, Jan, Peter O. Muller, Harm J. De Blij, Ann-Margaret Esnard, Richard Grant, and Michael E. Shin. 2017. Geography: realms, regions, and concepts. Hoboken, NJ: Wiley. 

Spengler, Robert N. 2020. Fruit from the sands: the Silk Road origins of the foods we eat. Oakland, California : University of California Press.