Houben, A. C. F. J. (1990). An international comparison of real output, labour productivity and purchasing power in the mineral industries of the United States, Brazil and Mexico for 1975. Faculty of Economics, Institute of Economic Research, University of Groningen.
Citazione stile Chigago Style (17a edizione)Houben, Aerdt C. F. J. An International Comparison of Real Output, Labour Productivity and Purchasing Power in the Mineral Industries of the United States, Brazil and Mexico for 1975. Groningen: Faculty of Economics, Institute of Economic Research, University of Groningen, 1990.
Citatione MLA (8a ed.)Houben, Aerdt C. F. J. An International Comparison of Real Output, Labour Productivity and Purchasing Power in the Mineral Industries of the United States, Brazil and Mexico for 1975. Faculty of Economics, Institute of Economic Research, University of Groningen, 1990.