Leff, L. S. (1984). Data processing the easy way. Barron's Educational Series.
Citación estilo ChicagoLeff, Lawrence S. Data Processing the Easy Way. Woodbury, NY: Barron's Educational Series, 1984.
Cita MLALeff, Lawrence S. Data Processing the Easy Way. Barron's Educational Series, 1984.
Warning: These citations may not always be 100% accurate.