Quirk, Randolph
A university grammar of English / Randolph Quirk and Sidney Greenbaum
English Language Book Society/Longman, 1989
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Sambrook, G.A.
English language
Longmans, Green, 1947
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Sambrook, G.A.
The English Language
Longmans Green & Co, 1947
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English this way English Language Services.
London Collier-Macmillan 1965,
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Greenbaum, Sidney
A students grammar of the English language
Longman , 1990
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