Pigford, D. V. (1990). Expert systems for Business concepts and applications featuring VP-Expert. Boyd & fraser Publishing.
Chicago Style (17th ed.) CitationPigford, D. V. Expert Systems for Business Concepts and Applications Featuring VP-Expert. Boyd & fraser Publishing, 1990.
MLA (8th ed.) CitationPigford, D. V. Expert Systems for Business Concepts and Applications Featuring VP-Expert. Boyd & fraser Publishing, 1990.
Warning: These citations may not always be 100% accurate.