(2001). HealthLeaders. Brentwood, TN: HealthLeaders, Inc..
Chicago Style aipamenaHealthLeaders. Brentwood, TN: HealthLeaders, Inc., 2001.
MLA aipamenaHealthLeaders. Brentwood, TN: HealthLeaders, Inc., 2001.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.