@book{205710,
	author = {Northrop, Douglas Taylor.},
	title = {A companion to world history /},
	publisher = {Wiley-Blackwell,},
	year = {2012.},
	series = {Wiley-Blackwell companions to history},
	address = {Malden, MA :},
	url = {http://onlinelibrary.wiley.com/book/10.1002/9781118305492}
}