APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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

Kontuz: berrikusi erreferentzia hauek erabili aurretik.