Ray, M. L. (1982). Advertising and communication management. Prentice-Hall.
Dyfyniad Arddull ChicagoRay, Michael L. Advertising and Communication Management. Englewood Cliffs, NJ: Prentice-Hall, 1982.
Dyfyniad MLARay, Michael L. Advertising and Communication Management. Prentice-Hall, 1982.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.