Style de citation APA (7e éd.)

(1955). Keys to happiness: A Reader's Digest guide to successful living. The Reader's Digest Association.

Style de citation Chicago (17e éd.)

Keys to Happiness: A Reader's Digest Guide to Successful Living. The Reader's Digest Association, 1955.

Style de citation MLA (9e éd.)

Keys to Happiness: A Reader's Digest Guide to Successful Living. The Reader's Digest Association, 1955.

Attention : ces citations peuvent ne pas être correctes à 100%.