Wilkinson, D., & LaFollette, H. (2013). Futility. John Wiley & Sons.
Lua i Stíl Chicago (17ú heag.)Wilkinson, D., agus H. LaFollette. Futility. John Wiley & Sons, 2013.
Lua MLA (9ú heag.)Wilkinson, D., agus H. LaFollette. Futility. John Wiley & Sons, 2013.
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