APA استشهاد

Unsold, A., & Bascheck, B. B. (2002). new cosmos: An introduction to astronomy and astrophysics (5th ed.). Springer.

استشهاد بنمط شيكاغو

Unsold, Albrecht, و Bodo Brewer Bascheck. New Cosmos: An Introduction to Astronomy and Astrophysics. 5th ed. New York: Springer, 2002.

MLA استشهاد

Unsold, Albrecht, و Bodo Brewer Bascheck. New Cosmos: An Introduction to Astronomy and Astrophysics. 5th ed. Springer, 2002.