APA (7th ed.) Citation

(1994). Reader's Digest: Book of facts (2nd ed.). Reader's Digest.

Chicago Style (17th ed.) Citation

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

MLA (8th ed.) Citation

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