Cita APA

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

Citación estilo Chicago

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

Cita MLA

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