Williams, J. R. (2006). Financial accounting (12/e.). McGraw-Hill/Irwin.
Lua i Stíl Chicago (17ú heag.)Williams, Jan R. Financial Accounting. 12/e. Boston, Mass.: McGraw-Hill/Irwin, 2006.
Lua MLA (8ú heag.)Williams, Jan R. Financial Accounting. 12/e. McGraw-Hill/Irwin, 2006.
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