From c710410bce7d662ef7b91bdacf52173d71a389de Mon Sep 17 00:00:00 2001
From: Ryan Yin <xiaoyin_c@qq.com>
Date: Mon, 17 Jul 2023 18:24:09 +0800
Subject: [PATCH] feat: add reference for the cover image

---
 README.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/README.md b/README.md
index bb224c4..cb3846d 100644
--- a/README.md
+++ b/README.md
@@ -49,6 +49,10 @@ Before adding a pull request, please see the [contributing guidelines](/.github/
 
 Thank you to [all the people](https://github.com/ryan4yin/nixos-and-flakes-book/graphs/contributors) who already contributed to this project!
 
+## References
+
+- The cover is based on the image from anime "[The Rolling Girls](https://en.m.wikipedia.org/wiki/The_Rolling_Girls)"
+
 ## License
 
 [MIT](https://opensource.org/licenses/MIT)