Coba jelasin Rujukan dari Ace Books dalam bahasa melayu dong

Corrick, James A. Double Your Pleasure: The Ace SF Double, Gryphon Books, 1989. . A historical article, followed by a checklist of the SF Doubles, giving prior publication history for the contents of each one.

Thiessen, J. Grant Science Fiction Collector #1, Pandora's Books, 1976. Includes checklist of all Ace singles and doubles in the science fiction, fantasy, and horror fields.

Thiessen, J. Grant Science Fiction Collector #2, Pandora's Books, date unknown. Includes errata for checklist in #1.

Tuck, Donald H. The Encyclopedia of Science Fiction and Fantasy: Volume 3, Advent: Publishers, Inc., 1982. . Lists all Ace sf titles, single and double, published through 1968.

Jaffery, Sheldon Double Trouble: A Bibliographic Chronicle of Ace Mystery Doubles, Starmont Popular Culture Series #11, Borgo Press, 1987. .

Jaffery, Sheldon Double Futures: An Annotated Bibliography of the Ace Science Fiction Doubles, Borgo Press, 1999. .

Peters, Harold R. Science Fiction, Fantasy & Horror in the Ace Letter-Series Editions: A Collector's Notebook, Silver Sun Press, 1996.