Novak, D. (1983). Student guide to margin exercises for arithmetic. US-MA: D.C Heath, Masachussetts.
Citación estilo ChicagoNovak, David. Student Guide to Margin Exercises for Arithmetic. US-MA: D.C Heath, Masachussetts, 1983.
Cita MLANovak, David. Student Guide to Margin Exercises for Arithmetic. US-MA: D.C Heath, Masachussetts, 1983.
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