Orton, H. D. (1871). Orton's lightning calculator, and accountant's assistant: The shortest, simplest, and most rapid method of computing numbers, adapted to every kind of business, and within the comprehension of every one having the slightest knowledge of figures (Entirely new edition, with extensive modifications and improvements..). Published by W.H. Sadler...
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Orton, Hoy D. Orton's Lightning Calculator, and Accountant's Assistant: The Shortest, Simplest, and Most Rapid Method of Computing Numbers, Adapted to Every Kind of Business, and Within the Comprehension of Every One Having the Slightest Knowledge of Figures. Entirely new edition, with extensive modifications and improvements.. Baltimore: Published by W.H. Sadler.., 1871.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Orton, Hoy D. Orton's Lightning Calculator, and Accountant's Assistant: The Shortest, Simplest, and Most Rapid Method of Computing Numbers, Adapted to Every Kind of Business, and Within the Comprehension of Every One Having the Slightest Knowledge of Figures. Entirely new edition, with extensive modifications and improvements.. Published by W.H. Sadler.., 1871.