Manuela Aparicio and Carlos J. Costa (novembro de 2014). "Data visualization". Communication Design Quarterly Review3: 7–11. doi:10.1145/2721882.2721883.
Funkhouser, Howard Gray (xaneiro de 1936). "A Note on a Tenth Century Graph". Osiris1: 260–262. JSTOR301609. doi:10.1086/368425.|data-acceso= require |url= (Axuda)
Funkhouser, Howard Gray (xaneiro de 1936). "A Note on a Tenth Century Graph". Osiris1: 260–262. JSTOR301609. doi:10.1086/368425.|data-acceso= require |url= (Axuda)