Dock, V. Thomas. Principles of business data processing, with BASIC / V. Thomas Dock, Edward Essick. - Alternate 3d ed. - Chicago : Science Research Associates, c1978. - xvi, 519 p. : ill. ; 25 cm. Includes index. ISBN: 0574212205 LCCN: 78012217 LC Class. No.: HF5548.2 .D582 1978b / .D582 1978b Dewey Class. No.: 004