Стиль цитування APA (7-ме видання)

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

Чикаго стиль цитування (17-те видання)

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

Стиль цитування MLA (9-ме видання)

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