Civitello, A., Dhar, S. P., Kravis, I. B., Heston, A., & Summers, R. (1978). International comparisons of real product and purchasing power :: United Nations international comparison project, phase II. Baltimore ; London: Johns Hopkins University Press.

Civitello, Alicia., Samvit P. Dhar, Irving B. Kravis, Alan Heston, and Robert Summers. International Comparisons of Real Product and Purchasing Power :: United Nations International Comparison Project, Phase II. Baltimore ; London: Johns Hopkins University Press, 1978.

Civitello, Alicia., et al. International Comparisons of Real Product and Purchasing Power :: United Nations International Comparison Project, Phase II. Baltimore ; London: Johns Hopkins University Press, 1978.