Zeilik, M. (1985). Astronomy the evolving universe. Harper and Row.
Chicago Style (17th ed.) CitationZeilik, Michael. Astronomy the Evolving Universe. New York: Harper and Row, 1985.
MLA (9th ed.) CitationZeilik, Michael. Astronomy the Evolving Universe. Harper and Row, 1985.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.