Cita APA (7th ed.)

Root, L., & Root, E. (1991). No more aching back: Dr. Root's new fifteen-minute-a-day program for a healthy back. Signet Book.

Cita Chicago (17th ed.)

Root, Leon, i Elisa Root. No More Aching Back: Dr. Root's New Fifteen-minute-a-day Program for a Healthy Back. New York: Signet Book, 1991.

Cita MLA (9th ed.)

Root, Leon, i Elisa Root. No More Aching Back: Dr. Root's New Fifteen-minute-a-day Program for a Healthy Back. Signet Book, 1991.