Seymour, P. (1983). Adventures with astronomy. John Murray.
Dyfyniad Arddull ChicagoSeymour, Percy. Adventures with Astronomy. London: John Murray, 1983.
Dyfyniad MLASeymour, Percy. Adventures with Astronomy. John Murray, 1983.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.