Cita APA (7th ed.)

Sanchez, B., & Sanchez, E. J. (2009). Don't worry, be happy: 7 secrets to achieve your dreams and enjoy great happiness today. Sheperd's Voice Publication, Inc.

Cita Chicago (17th ed.)

Sanchez, Bo, i Enriquez Jr Sanchez. Don't Worry, Be Happy: 7 Secrets to Achieve Your Dreams and Enjoy Great Happiness Today. Quezon City: Sheperd's Voice Publication, Inc, 2009.

Cita MLA (9th ed.)

Sanchez, Bo, i Enriquez Jr Sanchez. Don't Worry, Be Happy: 7 Secrets to Achieve Your Dreams and Enjoy Great Happiness Today. Sheperd's Voice Publication, Inc, 2009.