et.al, R. S. G. .. Medical epidemiology. Pretice-Hall International.
Chicago Style (17th ed.) Citationet.al, Raymond S. Greenberg ... Medical Epidemiology. Pretice-Hall International.
MLA (8th ed.) Citationet.al, Raymond S. Greenberg ... Medical Epidemiology. Pretice-Hall International.
Warning: These citations may not always be 100% accurate.