Leybourn, W. (1791). The twentieth edition of The ready reckoner, or, Trader's sure guide: Containing tables ready cast up, adapted to the use of all who deal by wholesale or retail ; exhibiting, at one view, the amount or value of any number or quantity of goods or merchandize, from one up to ten thousand, at the various prices, from one farthing to one pound. [Printed for J.F. and C. Rivington [and 7 others].
Chicago Style (17th ed.) CitationLeybourn, William. The Twentieth Edition of The Ready Reckoner, or, Trader's Sure Guide: Containing Tables Ready Cast Up, Adapted to the Use of All Who Deal by Wholesale or Retail ; Exhibiting, at One View, the Amount or Value of Any Number or Quantity of Goods or Merchandize, from One Up to Ten Thousand, at the Various Prices, from One Farthing to One Pound. London: [Printed for J.F. and C. Rivington [and 7 others], 1791.
MLA (9th ed.) CitationLeybourn, William. The Twentieth Edition of The Ready Reckoner, or, Trader's Sure Guide: Containing Tables Ready Cast Up, Adapted to the Use of All Who Deal by Wholesale or Retail ; Exhibiting, at One View, the Amount or Value of Any Number or Quantity of Goods or Merchandize, from One Up to Ten Thousand, at the Various Prices, from One Farthing to One Pound. [Printed for J.F. and C. Rivington [and 7 others], 1791.