Citazione APA

Haigh, R. W. E. (1981). Communications in the twentyfirst century. New York.

Stile di citazione Chicago

Haigh, Robert W. Etc. Communications in the Twentyfirst Century. John Wiley&Sons: New York, 1981.

Citazione MLA

Haigh, Robert W. Etc. Communications in the Twentyfirst Century. New York, 1981.