Practical English usage. Swan, M. Oxford ;, 2nd ed edition, 1995.
Practical English usage [link]Paper  bibtex   
@book{swan_practical_1995,
	edition = {2nd ed},
	title = {Practical {English} usage},
	url = {http://hdl.handle.net/2027/uc1.32106011646863},
	publisher = {Oxford ;},
	author = {Swan, Michael},
	year = {1995},
}

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