APA (7th ed.) Citation

Reader's Digest. (1980). Reader's Digest condensed books. Reader's Digest.

Chicago Style (17th ed.) Citation

Reader's Digest. Reader's Digest Condensed Books. Survey Hills, N.S.W.: Reader's Digest, 1980.

MLA (9th ed.) Citation

Reader's Digest. Reader's Digest Condensed Books. Reader's Digest, 1980.