Fenwick, G. (1810). Fenwick's arithmetical essay: Or A plain and concise mode of acquiring, in a short time, a complete knowledge of arithmetic. The whole adapted to the present time. Cottom & Stewart.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Fenwick, George. Fenwick's Arithmetical Essay: Or A Plain and Concise Mode of Acquiring, in a Short Time, a Complete Knowledge of Arithmetic. The Whole Adapted to the Present Time. Alexandria [Va.]: Cottom & Stewart, 1810.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Fenwick, George. Fenwick's Arithmetical Essay: Or A Plain and Concise Mode of Acquiring, in a Short Time, a Complete Knowledge of Arithmetic. The Whole Adapted to the Present Time. Cottom & Stewart, 1810.
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