@book{3986,
	author = {Speroff, Leon, and Glass, Robert H.,},
	title = {Clinical gynecologic endocrinology and infertility },
	publisher = {Lippincott Williams & Wilkins},
	year = {1999},
	address = {Philadelphia },
	edition = {6th ed.},
	url = {http://www.loc.gov/catdir/enhancements/fy0730/98036104-d.html}
}