@book{224214,
	author = {Simkin, Penny},
	title = {The birth partner},
	publisher = {Harvard Common Press},
	year = {c2008.},
	address = {Boston, Mass.},
	edition = {3rd ed.},
	url = {http://www.loc.gov/catdir/toc/ecip0721/2007025799.html}
}