@book{39899,
	author = {Hulley, Stephen B and Cummings, Steven R},
	title = {Diseño de Investigaciones Clínicas .},
	publisher = {Wolters Kluwer Health, S.A; Lippincott Williams & Wilkins,},
	year = {2014.},
	address = {[Place of publication not identified] :},
	edition = {4.},
	note = {Incluye Indice.}
}