Butts, I. R. (1855). The new business man's assistant, and ready reckoner. [The Author].
Lua i Stíl Chicago (17ú heag.)Butts, I. R. The New Business Man's Assistant, and Ready Reckoner. Boston: [The Author], 1855.
Lua MLA (8ú heag.)Butts, I. R. The New Business Man's Assistant, and Ready Reckoner. [The Author], 1855.
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