Reader's Digest Association. (1996). The world's most mysterious places. Reader's Digest.
Chicago-referens (17:e uppl.)Reader's Digest Association. The World's Most Mysterious Places. London: Reader's Digest, 1996.
MLA-referens (9:e uppl.)Reader's Digest Association. The World's Most Mysterious Places. Reader's Digest, 1996.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.