Turnbull, R. (1999). Explanations and implications of the 1997 amendments ... Merrill.
Lua i Stíl Chicago (17ú heag.)Turnbull, Rud. Explanations and Implications of the 1997 Amendments ... New Jersey: Merrill, 1999.
Lua MLA (9ú heag.)Turnbull, Rud. Explanations and Implications of the 1997 Amendments ... Merrill, 1999.
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