Spangenburg, R., & Moser, k. (2003). Observing the Universe. Franklin Watts.
Chicago Style (17th ed.) CitationSpangenburg, Ray, and kit Moser. Observing the Universe. New York: Franklin Watts, 2003.
MLA (9th ed.) CitationSpangenburg, Ray, and kit Moser. Observing the Universe. Franklin Watts, 2003.
Advarsel: Disse citationer er muligvist ikke 100% nøjagtige.