Citazione APA

Cowan, D. S. (1968). Advertising in the 21st century: A model of advertising agency development during the next fifty years. London: Hutchinson.

Stile di citazione Chicago

Cowan, D. S. Advertising in the 21st Century: A Model of Advertising Agency Development During the Next Fifty Years. London: Hutchinson, 1968.

Citazione MLA

Cowan, D. S. Advertising in the 21st Century: A Model of Advertising Agency Development During the Next Fifty Years. London: Hutchinson, 1968.

Attenzione: Queste citazioni potrebbero non essere precise al 100%.