HARFORD TIM. (2006). UNDERCOVER ECONOMIST. LITTLE BROWN AND COMPANY.
Lua i Stíl Chicago (17ú heag.)HARFORD TIM. UNDERCOVER ECONOMIST. LONDON: LITTLE BROWN AND COMPANY, 2006.
Lua MLA (9ú heag.)HARFORD TIM. UNDERCOVER ECONOMIST. LITTLE BROWN AND COMPANY, 2006.
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