APA Format
Kelsey, Jennifer L.; Whittemore, Alice S.; Evans, ALfred S. . (). Methods in observational epidemiology. :
MLA Format
Kelsey, Jennifer L.; Whittemore, Alice S.; Evans, ALfred S. . Methods in observational epidemiology. : ,
Australian/Harvard Format
Kelsey, Jennifer L.; Whittemore, Alice S.; Evans, ALfred S. . . Methods in observational epidemiology. , 
Warning: These citations may not always be 100% accurate.