APA
(1969). Reader's Digest Almanac and Yearbook. New York: Reader's Digest Association Incorporated.
Chicago
1969. Reader's Digest Almanac and Yearbook. New York: Reader's Digest Association Incorporated.
Harvard
(1969). Reader's Digest Almanac and Yearbook. New York: Reader's Digest Association Incorporated.
MLA
Reader's Digest Almanac and Yearbook. New York: Reader's Digest Association Incorporated. 1969.