Reader's digest Association. (1992). The good health fact book. Reader's digest association.
Cita Chicago (17th ed.)Reader's digest Association. The Good Health Fact Book. New York: Reader's digest association, 1992.
Cita MLA (9th ed.)Reader's digest Association. The Good Health Fact Book. Reader's digest association, 1992.
Atenció: Aquestes cites poden no estar 100% correctes.