Lua APA (7ú heag.)

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

Lua i Stíl Chicago (17ú heag.)

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

Lua MLA (8ú heag.)

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

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