APA Format 1-Define key terms in epidemiology, community health, and population-based research. (PO 1, 4) 2-Identify important sources of epidemiological data. (PO 4) Sources: Gordis, L. (2014 ). Epidemiology (5th ed.). Philadelphia, PA: Elsevier Chapter 1: Introduction Chapter 2: Dynamics of Disease Transmission Chapter 3: The Occurrence of Disease: I. Disease Surveillance and Measures of Morbidity. Chapter 4: The Occurrence of Disease: II. Mortality and Other Measures of Disease Impact. National Notifiable Disease Surveillance System Healthy People 2020 Morbidity and Mortality Weekly Report homepage (MMWR) .