Cita APA (7th ed.)

Beerel, A. (1993). Exper systems in business: Real world applications. Ellis Horwood.

Cita Chicago (17th ed.)

Beerel, Annabel. Exper Systems in Business: Real World Applications. New York: Ellis Horwood, 1993.

Cita MLA (9th ed.)

Beerel, Annabel. Exper Systems in Business: Real World Applications. Ellis Horwood, 1993.