Dyfyniad APA

(2011). Sky & Telescope, the Essential Magazine of Astronomy. February 1998. Sky Publishing Corp.

Dyfyniad Arddull Chicago

Sky & Telescope, the Essential Magazine of Astronomy. February 1998. Sky Publishing Corp, 2011.

Dyfyniad MLA

Sky & Telescope, the Essential Magazine of Astronomy. February 1998. Sky Publishing Corp, 2011.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.