Cita APA (7a ed.)

Middlehurst, B. M., & Aller, L. H. (1968). Nebulae and interstellar matter. University of Chicago Press.

Cita Chicago Style (17a ed.)

Middlehurst, Barbara M., y Lawrence H. Aller. Nebulae and Interstellar Matter. Chicago: University of Chicago Press, 1968.

Cita MLA (8a ed.)

Middlehurst, Barbara M., y Lawrence H. Aller. Nebulae and Interstellar Matter. University of Chicago Press, 1968.