(1999). One step to Spanish: For, work, business, travel, school, fun. Visual Teaching Systems.
Cita Chicago Style (17a ed.)One Step to Spanish: For, Work, Business, Travel, School, Fun. Chicago: Visual Teaching Systems, 1999.
Cita MLA (9a ed.)One Step to Spanish: For, Work, Business, Travel, School, Fun. Visual Teaching Systems, 1999.
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