Chaisson, E. (2007). Astronomy: A beginner's guide to the universe (5th ed.). Pearson/Benjamin Cummings.
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Dyfyniad Arddull Chicago
Chaisson, Eric. Astronomy: A Beginner's Guide to the Universe. 5th ed. San Francisco CA: Pearson/Benjamin Cummings, 2007.
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Dyfyniad MLA
Chaisson, Eric. Astronomy: A Beginner's Guide to the Universe. 5th ed. Pearson/Benjamin Cummings, 2007.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.