@book{221,
	author = {Alcira Noemi Samayoa Monroy},
	title = {Análisis De la Eficacia},
	publisher = {Universidad de San Carlos de Guatemala},
	year = {Febrero 2012},
	address = {Chiquimula Guatemala},
	note = {CD (1147)},
	url = {http://biblioteca.cunori.edu.gt/cgi-bin/koha/opac-retrieve-file.pl?id=4bcb51e7d0391a807f537563e64fdc3b}
}