APA (7th ed.) Citation

Reader's Digest Association. (1986). Reader's Digest book of facts. Readers's Digest.

Chicago Style (17th ed.) Citation

Reader's Digest Association. Reader's Digest Book of Facts. New South Wales, Australia: Readers's Digest, 1986.

MLA (9th ed.) Citation

Reader's Digest Association. Reader's Digest Book of Facts. Readers's Digest, 1986.