Cita APA (7a ed.)
Educational Testing Service. (2017). The Official Guide to the TOEFL Test (5a edición.). McGraw-Hill.
Cita estilo Chicago (17a ed.)
Educational Testing Service. The Official Guide to the TOEFL Test. 5a edición. Nueva York, EUA: McGraw-Hill, 2017.
Cita MLA (9a ed.)
Educational Testing Service. The Official Guide to the TOEFL Test. 5a edición. McGraw-Hill, 2017.
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