Cita APA (7a ed.)
Blish, J. Galactic Cluster. Signet : New American Library.
Cita estilo Chicago (17a ed.)
Blish, James. Galactic Cluster. Nueva York, EUA: Signet : New American Library.
Cita MLA (9a ed.)
Blish, James. Galactic Cluster. Signet : New American Library.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.