- Origins of WWII. TCi, https://student.teachtci.com/shared/sections/16563?nav_info=&program_id=284.
- The Impact of WWII on Americans. TCi, https://student.teachtci.com/shared/sections/16569?nav_info=&program_id=284.
- Fighting WWII. TCi, https://student.teachtci.com/shared/sections/16578?nav_info=&program_id=284.
- The Aftermath of World War II. TCi, https://student.teachtci.com/shared/sections/16584?nav_info=&program_id=284.
- Casualties of WWII. Lumen Learning, https://courses.lumenlearning.com/suny-hccc-worldhistory2/chapter/casualties-of-world-war-ii/.
- WWII Casualties. Wikipedia, https://en.wikipedia.org/wiki/World_War_II_casualties.