APA (7th ed.) Citation

Reader's Digest Association. (1994). Reader's Digest book of facts (2nd ed.). Reader's Digest.

Chicago Style (17th ed.) Citation

Reader's Digest Association. Reader's Digest Book of Facts. 2nd ed. Auckland: Reader's Digest, 1994.

MLA (9th ed.) Citation

Reader's Digest Association. Reader's Digest Book of Facts. 2nd ed. Reader's Digest, 1994.