Rujukan Cosmos_(buku)

  1. ↑ Golden, Frederic, Peter Stoler, and Calif. 1980. "The Cosmic Explainer He-e-e-re's Carl, bringing you nothing less than the universe." Time 116, no. 16: 62. Academic Search Complete, EBSCOhost (accessed April 10, 2013).
  2. ↑ "Pale Blue Dot". Powell's Books. Dicapai pada 3 January 2010.
  3. ↑ Sagan, Carl; Druyan, Ann; Tyson, Neil deGrasse (2013). Cosmos. New York: Ballantine Books. ISBN 978-0-345-53943-4.