London, J., & Bullard, N. (2008). The call of the wild (abridged version) (Simplified edition.). Oxford University Press.

London, Jack, and Nick Bullard. The Call of the Wild (abridged Version). Simplified edition. New York: Oxford University Press, 2008.

London, Jack, and Nick Bullard. The Call of the Wild (abridged Version). Simplified edition. Oxford University Press, 2008.