@book {Ammon1987,
	title = {Sociolinguistics: An International Handbook of the Science of Language and Society},
	volume = {1},
	year = {1987},
	publisher = {Walter de Gruyter},
	organization = {Walter de Gruyter},
	address = {Berlin},
	editor = {Ulrich Ammon and Norbert Dittmar and Mattheier, Klaus J and Trudgill, Peter}
}
