APA引文

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

Chicago Style (17th ed.) Citation

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

MLA引文

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