History.com. (2019). The Prehistoric Ages: How Humans Lived Before Written Records. Diakses dari: https://www.history.com/articles/prehistoric-ages-timeline
2. Zaman Mesolitikum
Khan Academy. (2021). The dawn of agriculture. Diakses dari: https://www.khanacademy.org/humanities/world-history/world-history-beginnings/birth-agriculture-neolithic-revolution/a/where-did-agriculture-come-from
History Cooperative. (2022). Prehistory: Paleolithic, Mesolithic, Neolithic Periods. Diakses dari: https://historycooperative.org/prehistory
3. Zaman Neolitikum
History.com. (2019). Neolithic Revolution. Diakses dari: https://www.history.com/articles/neolithic-revolution
Khan Academy. (2021). The dawn of agriculture. Diakses dari: https://www.khanacademy.org/humanities/world-history/world-history-beginnings/birth-agriculture-neolithic-revolution/a/where-did-agriculture-come-from
4. Zaman Perunggu
Britannica. (2023). Stone Age: Later Stages. Diakses dari: https://www.britannica.com/event/Stone-Age
History.com. (2019). Neolithic Revolution. Diakses dari: https://www.history.com/articles/neolithic-revolution
5. Zaman Besi
