Niven, W. (1964). Basic Accounting Procedures William Niven Dan Anka Ohman. Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Niven, William. Basic Accounting Procedures William Niven Dan Anka Ohman. Prentice-Hall, 1964.
Lua MLA (8ú heag.)Niven, William. Basic Accounting Procedures William Niven Dan Anka Ohman. Prentice-Hall, 1964.
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