Gott, V. (1977). This amazing, amazing, amazing but Knowledge universe: Knowledge universe. Progress Pub.
Dyfyniad Arddull ChicagoGott, V. This Amazing, Amazing, Amazing but Knowledge Universe: Knowledge Universe. Moscow: Progress Pub, 1977.
Dyfyniad MLAGott, V. This Amazing, Amazing, Amazing but Knowledge Universe: Knowledge Universe. Progress Pub, 1977.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.