Cita APA (7th ed.)
Hahn, D. B. (1997). Focus on health (3rd.ed.). Mosby.
Cita Chicago (17th ed.)
Hahn, Dale B. Focus on Health. 3rd.ed. Baltimore: Mosby, 1997.
Cita MLA (9th ed.)
Hahn, Dale B. Focus on Health. 3rd.ed. Mosby, 1997.
Atenció: Aquestes cites poden no estar 100% correctes.