Bell Telephone Laboratories. (2001). Bell Laboratories Record. Bell Telephone Laboratories.
Citação do estilo Chicago (17ª ed.)Bell Telephone Laboratories. Bell Laboratories Record. Murray Hill, NJ: Bell Telephone Laboratories, 2001.
Citação MLA (8ª ed.)Bell Telephone Laboratories. Bell Laboratories Record. Bell Telephone Laboratories, 2001.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.