Cita APA (7a ed.)
Rein, D. P. (1994). Spectrum Workbook 3: A communicative course in english. Prentice Hall.
Cita Chicago Style (17a ed.)
Rein, David P. Spectrum Workbook 3: A Communicative Course in English. United States: Prentice Hall, 1994.
Cita MLA (9a ed.)
Rein, David P. Spectrum Workbook 3: A Communicative Course in English. Prentice Hall, 1994.
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