Thomson, A. J., & Martinet, A. V. Indirect speech and passive voice (8a ed.).
Cita Chicago Style (17a ed.)Thomson, A. J., y A. V. Martinet. Indirect Speech and Passive Voice. 8a ed.
Cita MLA (8a ed.)Thomson, A. J., y A. V. Martinet. Indirect Speech and Passive Voice. 8a ed.
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