@book{141490,
	author = {Sieloff, Christina L. and ebrary, Inc.},
	title = {Middle range theory development using King's conceptual system},
	publisher = {Springer Pub. Co.,},
	year = {c2007.},
	address = {New York :},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10176174}
}