White, J. (1818). A practical system of mental arithmetic: To which also is subjoined, as an appendix thereto, a variety of contracted examples. Printed by D. Heartt for the author.
Chicago-Zitierstil (17. Ausg.)White, John. A Practical System of Mental Arithmetic: To Which Also Is Subjoined, as an Appendix Thereto, a Variety of Contracted Examples. Philadelphia: Printed by D. Heartt for the author, 1818.
MLA-Zitierstil (9. Ausg.)White, John. A Practical System of Mental Arithmetic: To Which Also Is Subjoined, as an Appendix Thereto, a Variety of Contracted Examples. Printed by D. Heartt for the author, 1818.
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