APA (7e ed.) Bronvermelding

Fraknoi, A., Morrison, D., & Wolff, S. (2004). Voyages through the universe (3rd ed.). Thomson.

Chicago (17e ed.) Bronvermelding

Fraknoi, Andrew, David Morrison, en Sidney Wolff. Voyages Through the Universe. 3rd ed. Belmont, CA: Thomson, 2004.

MLA (8e ed.) Bronvermelding

Fraknoi, Andrew, et al. Voyages Through the Universe. 3rd ed. Thomson, 2004.