Cita APA (7a ed.)

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

Cita Chicago Style (17a ed.)

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

Cita MLA (9a ed.)

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