@book{36466,
	author = {Small, Edward S., and Johnson, Timothy W., and ebrary, Inc.},
	title = {Direct theory},
	publisher = {Southern Illinois University Press,},
	year = {2013.},
	address = {Carbondale :},
	edition = {2nd ed.},
	url = {http://site.ebrary.com/lib/rucke/Doc?id=10739607}
}