Turnbull, J. G., Cohen, M. S., & Pepple, M. (1966). The changing faces of economic insecurity. University of Minnesota Press.

Turnbull, John Gudert, Malcolm S. Cohen, and Mary Pepple. The Changing Faces of Economic Insecurity. Minneapolis: University of Minnesota Press, 1966.

Turnbull, John Gudert, et al. The Changing Faces of Economic Insecurity. University of Minnesota Press, 1966.