Cita APA

Packard, S. S., & Horton, B. (1887). The new Packard commercial arithmetic. S.S. Packard.

Citación estilo Chicago

Packard, S. S., and Byron Horton. The New Packard Commercial Arithmetic. New York: S.S. Packard, 1887.

Cita MLA

Packard, S. S., and Byron Horton. The New Packard Commercial Arithmetic. S.S. Packard, 1887.