Walker, C. R. (1962). Modern technology and civilization. New York: McGraw-Hill Book Company, Inc.
Trích dẫn kiểu ChicagoWalker, Charles R. Modern Technology and Civilization. New York: McGraw-Hill Book Company, Inc, 1962.
Deismireacht MLAWalker, Charles R. Modern Technology and Civilization. New York: McGraw-Hill Book Company, Inc, 1962.
Rabhadh: D'fhéadfadh nach mbeadh na deismireachtaí seo 100% cruinn i gcónaí.