Dyfyniad APA

Sparke, L. S., & Gallagher, J. S. (2000). Galaxies in the universe: An introduction. Cambridge University Press.

Dyfyniad Arddull Chicago

Sparke, Linda S., and John S. Gallagher. Galaxies in the Universe: An Introduction. Cambridge: Cambridge University Press, 2000.

Dyfyniad MLA

Sparke, Linda S., and John S. Gallagher. Galaxies in the Universe: An Introduction. Cambridge University Press, 2000.

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