European Computing Services Association & International Data Corporation. (1985). Ninth annual survey of the computing services industry in Europe. International Data Corporation.
Cita Chicago Style (17a ed.)European Computing Services Association y International Data Corporation. Ninth Annual Survey of the Computing Services Industry in Europe. Londres?: International Data Corporation, 1985.
Cita MLA (9a ed.)European Computing Services Association y International Data Corporation. Ninth Annual Survey of the Computing Services Industry in Europe. International Data Corporation, 1985.
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