@book{5233,
	author = {Samuelson, Paul Anthony, and Nordhaus, William D.,},
	title = {Economia /},
	publisher = {AMGH,},
	year = {2012.-},
	address = {Porto Alegre :},
	edition = {19. ed. -},
	note = {Título original: Economics},
	url = {https://books.google.com.br/books?id=ShAxpOb5WGQC&printsec=frontcover&dq=economia+samuelson&hl=pt-BR&sa=X&ved=0ahUKEwj0rZTn59ThAhXNm-AKHfrOAN8Q6AEIJzAA#v=onepage&q=economia%20samuelson&f=false}
}