Blish, J. Star trek 1. Corgi books.
Dyfyniad Arddull ChicagoBlish, James. Star Trek 1. New York: Corgi books.
Dyfyniad MLABlish, James. Star Trek 1. Corgi books.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.
Blish, J. Star trek 1. Corgi books.
Dyfyniad Arddull ChicagoBlish, James. Star Trek 1. New York: Corgi books.
Dyfyniad MLABlish, James. Star Trek 1. Corgi books.