Turner, V. W., & Turner, E. L. B. (1992). Blazing the trail: Way marks in the exploration of symbols. University of Arizona Press.

Turner, Victor W., and Edith L. B. Turner. Blazing the Trail: Way Marks in the Exploration of Symbols. Tucson: University of Arizona Press, 1992.

Turner, Victor W., and Edith L. B. Turner. Blazing the Trail: Way Marks in the Exploration of Symbols. University of Arizona Press, 1992.