Sheppard, S. E., & Carroll, D. C. (1980). Working in the twenty-first century. John Wiley and Sons.
Citace podle Chicago (17th ed.)Sheppard, Stewart E., a Donal C. Carroll. Working in the Twenty-first Century. John Wiley and Sons, 1980.
Citace podle MLA (9th ed.)Sheppard, Stewart E., a Donal C. Carroll. Working in the Twenty-first Century. John Wiley and Sons, 1980.
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