@book {Leech1983,
	title = {Principles of pragmatics},
	series = {Longman linguistics library},
	number = {30},
	year = {1983},
	pages = {250},
	publisher = {Longman},
	organization = {Longman},
	edition = {9},
	address = {London},
	author = {Leech, Geoffrey N.}
}
