(1974). Britannica book of the year 1974. Chicago: Helen Hemingway Benton.
Trích dẫn kiểu ChicagoBritannica Book of the Year 1974. Chicago: Helen Hemingway Benton, 1974.
Deismireacht MLABritannica Book of the Year 1974. Chicago: Helen Hemingway Benton, 1974.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.