Walker, M. (1982). Powers of the press: The world's great newspapers. Quartet Books.
Chicago-viite (17. p.)Walker, Martin. Powers of the Press: The World's Great Newspapers. London: Quartet Books, 1982.
MLA-viite (9. p.)Walker, Martin. Powers of the Press: The World's Great Newspapers. Quartet Books, 1982.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.