Sammon, W. L., & Kurkland, M. A. (1984). Business Competitor Intelligence. Ronald.
Dyfyniad Arddull ChicagoSammon, William L., and Mark A. Kurkland. Business Competitor Intelligence. New York: Ronald, 1984.
Dyfyniad MLASammon, William L., and Mark A. Kurkland. Business Competitor Intelligence. Ronald, 1984.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.