Books:

1. Rothman, K. J., Greenland, S., & Lash, T. L. (2008). Modern Epidemiology, 3rd Edition. Philadelphia, PA: Lippincott, Williams & Wilkins
2. Gordis, L. (2009). Epidemiology. Philadelphia: Elsevier/Saunders.
3. Porta, M. (2014). A dictionary of epidemiology, 5th edition. Oxford, New York: Oxford University Press. Available at: http://www.irea.ir/files/site1/pages/dictionary.pdf
4. Friedman L., et al. (2015).  Fundamentals of Clinical Trials, 5th edition. Springer. Available at: http://link.springer.com/book/10.1007%2F978-3-319-18539-2
5. Hulley S., et al (2015). Designing Clinical Research, 4th Edition. Lippincott Williams & Wilkins.

Online Videos and Other Resources:

1. US Centers for Disease Control and Prevention: Principles of Epidemiology in Public Health Practice, Third Edition An Introduction to Applied Epidemiology and Biostatistics: http://www.cdc.gov/ophss/csels/dsepd/ss1978/lesson1/section7.html
2. Intro to Epidemiology Study Designs:
3. Epidemiology Study Types: Cohort and Case-Control: 
4. Epidemiology Study Types: Randomized Control Trial: 
5. On intervention studies: https://www.iarc.fr/en/publications/pdfs-online/epi/cancerepi/CancerEpi-7.pdf
6. On ecological studies: 

• Levin KA. Study Design VI:Ecological Studies. Evid-based Dent 2006;7:10. http://www.nature.com/ebd/journal/v7/n4/full/6400454a.html 
• http://www.bmj.com/about-bmj/resources-readers/publications/epidemiology-uninitiated/6-ecological-studies
• https://onlinecourses.science.psu.edu/stat507/node/4