NEUMAN, D. (1980). English grammar for proficiency. D.M. Neuman.
Lua i Stíl Chicago (17ú heag.)NEUMAN, D.M. English Grammar for Proficiency. Nairobi: D.M. Neuman, 1980.
Lua MLA (9ú heag.)NEUMAN, D.M. English Grammar for Proficiency. D.M. Neuman, 1980.
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