Powers, O. M. (1899). The complete accountant: Designed for the use of schools and private study. A book of reference for the counting-house, embodying the latest forms and methods in use in the best business houses (New ed.). O. M. Powers.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Powers, O. M. The Complete Accountant: Designed for the Use of Schools and Private Study. A Book of Reference for the Counting-house, Embodying the Latest Forms and Methods in Use in the Best Business Houses. New ed. Chicago : New York: O. M. Powers, 1899.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Powers, O. M. The Complete Accountant: Designed for the Use of Schools and Private Study. A Book of Reference for the Counting-house, Embodying the Latest Forms and Methods in Use in the Best Business Houses. New ed. O. M. Powers, 1899.