Calkins, R. M. (1981). Antitrust Guidelines for the Business Executive. Dow Jones- Irwin.
Dyfyniad Arddull ChicagoCalkins, Richard M. Antitrust Guidelines for the Business Executive. Homewood Ill: Dow Jones- Irwin, 1981.
Dyfyniad MLACalkins, Richard M. Antitrust Guidelines for the Business Executive. Dow Jones- Irwin, 1981.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.