APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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