Masud, F. (2005). Essentials of English Grammar a practical Guide. BPFE.
Lua i Stíl Chicago (17ú heag.)Masud, Fuad. Essentials of English Grammar a Practical Guide. BPFE, 2005.
Lua MLA (8ú heag.)Masud, Fuad. Essentials of English Grammar a Practical Guide. BPFE, 2005.
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