@book{140,
	author = {Congrains Martín, Enrique. and Alaiza, Lourdes,},
	title = {Así es como se estudia /},
	publisher = {Editorial Forja },
	year = {1978.},
	address = {Bogotá },
	edition = {4. ed. en español.},
	note = {7560.}
}