Stevens, F. L., Butler, T., & Stevens, A. T. C. (1910). A practical arithmetic. Charles Scribner's Sons.
Cita Chicago (17th ed.)Stevens, F. L., Tait Butler, i A. T. Chapman Stevens. A Practical Arithmetic. New York: Charles Scribner's Sons, 1910.
Cita MLA (9th ed.)Stevens, F. L., et al. A Practical Arithmetic. Charles Scribner's Sons, 1910.
Atenció: Aquestes cites poden no estar 100% correctes.