* What Are the Three Marks of Existence? [https://www.lionsroar.com/what-are-the-three-marks-of-existence/ What Are the Three Marks of Existence?]
* Anicca, Anatta, Dukkha The Three Marks Of Existence by John Haspel. [https://becoming-buddha.com/anicca-anatta-dukkha-three-marks-of-existence/ Anicca, Anatta, Dukkha The Three Marks Of Existence by John Haspel.]
* [https://balancedachievement.com/spirituality/3-marks-of-existence/ Teachings of the Buddha: The 3 Marks of Existence, written by Patrick Zeis November 4, 2016. [https://balancedachievement.com/spirituality/3-marks-of-existence/]
* On the Three Marks of Existence. [http://www.nippapanca.org/on-the-three-marks-of-existence.html On the Three Marks of Existence.]
