Ashmore, Harry (martie 1966). „Custodians of the City”. The Niemans Reports. The Nieman Foundation for Journalism at Harvard University. Arhivat din original la . Accesat în .
Ashmore, Harry (martie 1966). „Custodians of the City”. The Niemans Reports. The Nieman Foundation for Journalism at Harvard University. Arhivat din original la . Accesat în .