@book{36774,
	author = {Thyer, Bruce A.},
	title = {Quasi-experimental research designs},
	publisher = {Oxford University Press,},
	year = {2012.},
	series = {Pocket guides to social work research methods},
	address = {New York ;},
	url = {http://dx.doi.org/10.1093/acprof:oso/9780195387384.001.0001}
}