Cita APA (7a ed.)
Doff, A., & Jones, C. (1999). Language in use beginner. Self - study workbook: With answer key. Cambridge University Press.
Cita Chicago Style (17a ed.)
Doff, Adrian, y Christopher Jones. Language in Use Beginner. Self - Study Workbook: With Answer Key. Cambridge: Cambridge University Press, 1999.
Cita MLA (9a ed.)
Doff, Adrian, y Christopher Jones. Language in Use Beginner. Self - Study Workbook: With Answer Key. Cambridge University Press, 1999.
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