Sawyer, K. (1998). Brightest cosmic explosion documented. Today.
Dyfyniad Arddull ChicagoSawyer, Kathy. "Brightest Cosmic Explosion Documented." Today 1998.
Dyfyniad MLASawyer, Kathy. "Brightest Cosmic Explosion Documented." Today, 1998.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.