APA

Reader's Digest, . (1991). Reader's Digest. New York: The Reader's Digest Assoc.

Chicago

Reader's Digest, . 1991. Reader's Digest. New York: The Reader's Digest Assoc.

Harvard

Reader's Digest, . (1991). Reader's Digest. New York: The Reader's Digest Assoc.

MLA

Reader's Digest, . Reader's Digest. New York: The Reader's Digest Assoc. 1991.