Cita APA (7a ed.)

Dufay, J. (1968). Galactic nebulae and interstellar matter. Dover Publications.

Cita Chicago Style (17a ed.)

Dufay, Jean. Galactic Nebulae and Interstellar Matter. New York: Dover Publications, 1968.

Cita MLA (9a ed.)

Dufay, Jean. Galactic Nebulae and Interstellar Matter. Dover Publications, 1968.