Cita APA (7a ed.)

Leff, L. S. (1984). Data processing the easy way. Barron's Educational Series.

Cita Chicago Style (17a ed.)

Leff, Lawrence S. Data Processing the Easy Way. Woodbury, NY: Barron's Educational Series, 1984.

Cita MLA (9a ed.)

Leff, Lawrence S. Data Processing the Easy Way. Barron's Educational Series, 1984.