Irion, R. (2001). Galaxies: Island universes. Reader's Digest.
Chicagoスタイル(17版)引用形式Irion, Robert. Galaxies: Island Universes. Pleasantville: Reader's Digest, 2001.
MLA(9版)引用形式Irion, Robert. Galaxies: Island Universes. Reader's Digest, 2001.
警告: この引用は必ずしも正確ではありません.