Calpin, M. (1984). Understanding audits and audit reports (4th ed.). Canadian Institute of Chartered Accountants.
Lua i Stíl Chicago (17ú heag.)Calpin, Martin. Understanding Audits and Audit Reports. 4th ed. [Toronto]: Canadian Institute of Chartered Accountants, 1984.
Lua MLA (9ú heag.)Calpin, Martin. Understanding Audits and Audit Reports. 4th ed. Canadian Institute of Chartered Accountants, 1984.
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