Dyfyniad APA

Reader's Digest Association. (1996). Great mysteries of the 20th century. Reader's Digest.

Dyfyniad Arddull Chicago

Reader's Digest Association. Great Mysteries of the 20th Century. Pleasantville: Reader's Digest, 1996.

Dyfyniad MLA

Reader's Digest Association. Great Mysteries of the 20th Century. Reader's Digest, 1996.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.