Cita APA (7a ed.)

Pigford, D., & Baur, G. R. (1990). Expert systems for business: Concepts and applications : featuring VP-Expert. Boyd & Fraser.

Cita Chicago Style (17a ed.)

Pigford, Darleen, y Gregory R. Baur. Expert Systems for Business: Concepts and Applications : Featuring VP-Expert. Boston: Boyd & Fraser, 1990.

Cita MLA (9a ed.)

Pigford, Darleen, y Gregory R. Baur. Expert Systems for Business: Concepts and Applications : Featuring VP-Expert. Boyd & Fraser, 1990.