Rujukan Ace Books

  1. ↑ Tuck, Donald H. (1978). The Encyclopedia of Science Fiction and Fantasy: Volume 2. Chicago: Advent: Publishers, Inc. m/s. 471. ISBN 0-911682-22-8. 
  2. ↑ Kelley, George (1982). "Ace Books". dalam Cnider, Allen Billy. Mass Market Publishing in America. Boston: G.K. Hall & Co. m/s. 1–14. ISBN 0-8161-8590-5. 
  3. ↑ Corrick, James A. (1989). Double Your Pleasure: the ACE SF Double. New York: Gryphon Books. m/s. 12, 63. ISBN 0-936071-13-3. 
  4. ↑ Knight, Damon (1977). The Futurians. New York: John Day. m/s. 130. 
  5. ↑ Corrick, James A. (1989). Double Your Pleasure: the ACE SF Double. New York: Gryphon Books. m/s. 11. ISBN 0-936071-13-3.