O'Meara, S. J. (2011). Deep-sky companions: The secret deep. Cambridge University Press.
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Dyfyniad Arddull Chicago
O'Meara, Stephen James. Deep-sky Companions: The Secret Deep. Cambridge ; New York: Cambridge University Press, 2011.
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Dyfyniad MLA
O'Meara, Stephen James. Deep-sky Companions: The Secret Deep. Cambridge University Press, 2011.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.