@book{32224,
	author = {Zulliger, Hans. and Serrate, Agustin,},
	title = {Los niños dificiles /},
	publisher = {Ediciones Morata,},
	year = {1979.},
	series = {Colección psicología : La psicología y el niño},
	address = {madrid :},
	edition = {3a ed.},
	note = {Titulo original. Schewierige Kinder.}
}