(1990). Linguaphone Intermediate English Course Futher Practice Exercises. Linguaphone Institute Limited.
Cita Chicago Style (17a ed.)Linguaphone Intermediate English Course Futher Practice Exercises. Linguaphone Institute Limited, 1990.
Cita MLA (8a ed.)Linguaphone Intermediate English Course Futher Practice Exercises. Linguaphone Institute Limited, 1990.
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