APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.