Παραπομπή APA

Unsold, A., Baschek, B., & Brewer, W. D. (2002). The new cosmos: An introduction to astronomy and astrophysics (5th ed.). Berlin: Springer.

Παραπομπή Chicago Style

Unsold, Albrecht, Bodo Baschek, and William D. Brewer. The New Cosmos: An Introduction to Astronomy and Astrophysics. 5th ed. Berlin: Springer, 2002.

Παραπομπή MLA

Unsold, Albrecht, Bodo Baschek, and William D. Brewer. The New Cosmos: An Introduction to Astronomy and Astrophysics. 5th ed. Berlin: Springer, 2002.

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