Cita APA (7a ed.)
(1977). NC from the user s point of view. Num.Control Society.
Cita Chicago Style (17a ed.)
NC from the User S Point of View. Illinois: Num.Control Society, 1977.
Cita MLA (9a ed.)
NC from the User S Point of View. Num.Control Society, 1977.
Precaución: Estas citas no son 100% exactas.