Paper  bibtex   

@book{dryer_world_2013,
	Address = {Leipzig},
	Date = {2013},
	Date-Modified = {2016-09-22 20:24:45 +0000},
	Editor = {Dryer, Matthew S and Haspelmath, Martin},
	Keywords = {linguistics, typology},
	Publisher = {Max Planck Institute for Evolutionary Anthroplogy},
	Title = {The world atlas of language structures online},
	Url = {http://wals.info},
	Bdsk-Url-1 = {http://wals.info}}