Cita APA (7a ed.)

Lang, K. R., & Gingerich, O. (1979). A Source book in astronomy and astrophysics: 1900-1975. Harvard University Press.

Cita Chicago Style (17a ed.)

Lang, Kenneth R., y Owen Gingerich. A Source Book in Astronomy and Astrophysics: 1900-1975. Cambridge, Mas., etc.: Harvard University Press, 1979.

Cita MLA (9a ed.)

Lang, Kenneth R., y Owen Gingerich. A Source Book in Astronomy and Astrophysics: 1900-1975. Harvard University Press, 1979.