COWAN, D. (1968). Advertising in the 21st century: A model of advertising agency development during the next fifty years. Hutchinson.
Citazione stile Chigago Style (17a edizione)COWAN, D.S. Advertising in the 21st Century: A Model of Advertising Agency Development During the Next Fifty Years. London: Hutchinson, 1968.
Citatione MLA (9a ed.)COWAN, D.S. Advertising in the 21st Century: A Model of Advertising Agency Development During the Next Fifty Years. Hutchinson, 1968.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.