Marshall, C. C., & Goodyear, S. H. (1910). Inductive commercial arithmetic: A practical treatise on business computation. Goodyear-Marshall Pub. Co..
Chicago-referens (17:e uppl.)Marshall, Carl C., och Samuel Horatio Goodyear. Inductive Commercial Arithmetic: A Practical Treatise on Business Computation. Cedar Rapids, Ia.: Goodyear-Marshall Pub. Co., 1910.
MLA-referens (8:e uppl.)Marshall, Carl C., och Samuel Horatio Goodyear. Inductive Commercial Arithmetic: A Practical Treatise on Business Computation. Goodyear-Marshall Pub. Co., 1910.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.