Cita APA (7a ed.)

Grant, F. L., & Hill, A. M. (1929). Commercial arithmetic. Longmans, Green, and Co.

Cita Chicago Style (17a ed.)

Grant, Frank L., y Alexander M. Hill. Commercial Arithmetic. London [etc.]: Longmans, Green, and Co, 1929.

Cita MLA (9a ed.)

Grant, Frank L., y Alexander M. Hill. Commercial Arithmetic. Longmans, Green, and Co, 1929.