Fraknoi, A., & Morrison, D. W. (2001). Voyages through the universe (2nd ed.). Harcourt College Publishers.
Style de citation ChicagoFraknoi, Andrew, et David Wolff Morrison. Voyages Through the Universe. 2nd ed. Philadelphia: Harcourt College Publishers, 2001.
Style de citation MLAFraknoi, Andrew, et David Wolff Morrison. Voyages Through the Universe. 2nd ed. Harcourt College Publishers, 2001.
Attention : ces citations peuvent ne pas être correctes à 100%.